Next stop the ocean worlds of Enceladus and Europa
Space news (planetary science: water worlds of the solar system; Enceladus and Europa) –planets and moons around the solar system and exoplanets across the universe covered with water–
The solar system’s awash in water! NASA missions have provided verifiable facts showing ocean worlds and moons exist in our solar system and beyond,other than Earth. Planetary bodieswhere water is locked in a frozen embrace and even flowing beneath miles of ice. Liquid water exobiologists are keen to explore for life forms they would love to meet and get to know a little better during the next phase of the human journey to the beginning of space and time. Watch this YouTube video on NASA’s search for life on the ocean worlds of the solar system.
Papers published bythe journal Science and written by Cassini mission scientists and researchers working with the Hubble Space Telescope indicate hydrogen gas believed pouring from the subsurface ocean of Enceladus could potentially provide chemical energy life could use to survive and evolve. Watch this YouTube videocalled “NASA: Ingredients for Life at Saturn’s moon Enceladus“, itshowsthe proof scientists used to come to these conclusions. Their work provides new insights concerning possible oceans of water on moons of Jupiter and Saturn and other ocean moons in the solar system and beyond.
“This is the closest we’ve come, so far, to identifying a place with some of the ingredients needed for a habitable environment,” said Thomas Zurbuchen, associate administrator for NASA’s Science Mission Directorate at Headquarters in Washington. ”These results demonstrate the interconnected nature of NASA’s science missions that are getting us closer to answering whether we are indeed alone or not.”
Researchers believe they have found evidence indicating hydrogen gas could be pouring out of hydrothermal vents on the floor of Saturn’s moon Enceladus and into these oceans of water. Any microbes existing in these distant waters could use this gas as a form of chemical energy to operate biological processes. By combining hydrogen with carbon dioxide dissolved in this ocean of water in a chemical reaction called methanogenesis, geochemists think methane could be produced which could act as the basis of a tree of life similar to the one observed on Earth.
On Earth, this process is thought to be at the root of the tree of life, and could even be essential, critical to the origin of life on our little blue dot. Life existing on our planet requires three main ingredients, liquid water, a source of energy for metabolic processes, and specific chemical ingredients to develop and continue to thrive. This study shows Enceladus could have the right ingredients for life to exist, but planetary scientists and exobiologists are looking for evidence of the presence of sulfur and phosphorus.
Previous data shows the rocky core of this moon is similar to meteorites containing these two elements, so they’re thought to be chemically similar in nature, and scientists are looking for the same chemical ingredients of life found on Earth, primarilycarbon, nitrogen, oxygen, and of course hydrogen, phosphorus, and sulphur.
“Confirmation that the chemical energy for life exists within the ocean of a small moon of Saturn is an important milestone in our search for habitable worlds beyond Earth,” said Linda Spilker, Cassini project scientist at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California.
Cassini detected hydrogen in plumes of gas and frozen matter spewing from Enceladus during the spacecraft’s deepest pass over its surface on October 28, 2015. This combined with previous data obtained by Cassini’s Ion and Neutral Mass Spectrometer (INMS) during earlier flybys around 2005,helped scientists determine that nearly 98 percent of the material spraying from the surface of the moon is water. The remaining two percent is thought to be around 1 percent hydrogen with some carbon dioxide, methane,ammonia and assorted unknown molecules in the mix.
Cassini has shown us two independent detections of possible water spewing from the surface of Enceladus. NASA and its partners are currently looking over proposals to send spacecraft to determineif there is an ocean of water beneath its surface by taking a sample. The Europa Life Finder (ELF)is the proposal NASA’s seriously looking at undertaking at this point, but reports indicate a few other proposals are also being discussed.We’ll provide additional information on other proposals as they’re released to media outlets.
“Although we can’t detect life, we’ve found that there’s a food source there for it. It would be like a candy store for microbes,” said Hunter Waite, lead author of the Cassini study.
Two different observations of possible plumes of water spraying from the icy surface of Saturn’s moon Enceladus provides proof hydrothermal activity is occurring beneath. Geophysicists believe hot water is combining chemically with rock and other matter at the bottom of an ocean of water underneath its icy surface to produce hydrogen gas. Hydrogen gas exobiologists think could be used as energy, food of a sort, to sustain life forms exobiologists want to meet and learn more about. A meeting that would change our place in the cosmos, the way we think about the universe, and reality.
Astronomers and researchers working with the Hubble Space Telescope in 2016 reported on an observation of a possible plume erupting from the icy surface of Europa in the same general location Hubble observed a possible plume in 2014. This location also corresponds to the unusually warm region with cracks in the icy surface observed by NASA’s Galileo spacecraft back in the 1990s.This provides evidence this phenomenon could be periodic, intermittent in this region of the moon. Mission planners are looking at this region as a possible location to obtain a sample ofwater erupting from a possible ocean of water beneath its icy surface. Watch this video on Europa.
Estimates of the sizeof this most recently observed plume indicate it rose about 62 miles (~100 kilometers) from the surface of Europa, while the plume in 2014 only reached a height of around 30 miles (50 kilometers).
“The plumes on Enceladus are associated with hotter regions, so after Hubble imaged this new plume-like feature on Europa, we looked at that location on the Galileo thermal map. We discovered that Europa’s plume candidate is sitting right on the thermal anomaly,” said William Sparks of the Space Telescope Science Institute in Baltimore, Maryland. Sparks led the Hubble plume studies in both 2014 and 2016.
One interesting thought’s the plumes and the hot spot is somehow linked. If this is the case, it could mean the vented water’s falling onto the surface of the moon, which would change the structure and chemistry of the surface grains and allow them to retain heat longer than the surrounding region. This location would be a great place to search for the ingredients of life and a possible entry point into an ocean of water beneath.
These observations by the Hubble Space Telescope and future looks enable future space missions to Europa and other ocean worlds in the solar system. Specifically, laying the groundwork for NASA’s Europa Clipper mission, which is setfor a launch sometime in the 2020s.
“If there are plumes on Europa, as we now strongly suspect, with the Europa Clipper we will be ready for them,” said Jim Green, Director of Planetary Science, at NASA Headquarters.
NASA has indicated they’re looking to identify a possible site with persistent, intermittent plume activity as a target location for a mission to Europa to explore using its powerful suite of science instruments. Another team’s currently at work on a powerful ultraviolet camera to add to the Europa Clipper that would offer data similar to that provided by the Hubble Space Telescope, while some members of the Cassini team areworking on a very sensitive, next generation INMS instrument to put on the spacecraft.
Water’s the story of life on Earth! Science has shown it played and plays the main part in the birth,evolution, and sustenance of life on Earth.
NASA’s planning on taking the human journey to the beginning of space and time to the ocean worlds of the solar system during the decades ahead. To search for the ingredients of life and even possibly simple one-celled life forms, of an unknown type. We plan on going along for the ride to have a look for ourselves and we hope to see your name on the ship manifest. We’ll save a seat for you.
Join the human journey to the beginning of space and time by taking part in NASA’s Backyard Worlds: Planet 9. Participants take part in the search for hidden worlds between Neptune and Proxima Centauri.
In order to better understand intricate operations and detailed planning needed to capture multi-ton boulder from asteroid surface
Space news (Asteroid Redirect Mission: testing of prototype of robotic capture module system) – The Robotic Operations Center of NASA’s Goddard Space Flight Center –
Inside the Robotic Operations Center (ROC) of NASA’s Goddard Space Flight Center engineers are at work preparing the robotic section of the Asteroid Redirect Mission (ARM). The most recent work involved testing a prototype of the asteroid capture system with a mock boulderbuilt by NASA and students from West Virginia University. This work will help engineers learn more about the intricate operations needed to capture a multi-ton boulder from the surface of an asteroid. The robotic section of ARM is targeted for a 2021 launch window.
The capability built into the ROC allows engineers to create a simulation of the capture of a boulder from the surface of an asteroid. Here they can also simulate servicing of the satellite, fine tuning of systems and controllers, and even optimize all performance factors for future repairs and refueling. An important capabilitywhen building spacecraft worth hundreds of millions of dollars and even more. One that saves money and time.
The report reflects the findings of a two-month study conducted by members of the Small Bodies Assessment Group (SBAG). It explains many of ARM’s potential contributions to the future of the human journey to the beginning of space and time.
“This report is an important step in identifying ways that ARM will be more scientifically relevant as we continue mission formulation for the robotic and the crew segments,” said Gates. “We’re currently in the process of selecting hosted instruments and payloads for the robotic segment, and hope to receive an updated analysis from the SBAG after we announce those selections in spring 2017.”
Schiaparelli module separates from Trace Gas Orbiter in preparation for orbit-raising maneuver
Space news (space exploration: ExoMars 2016; orbit insertion and Schiaparelli module descent to surface) – Over 34 million miles (56 million kilometers) from Earth, preparing to descend to the surface of the Red Planet –
NASA’s Curiosity rover and other Mars explorers are about to get a little help from their European and Russian brothers and sisters in the form of the ExoMars Trace Gas Orbiter (TGO). One of two joint space missions between Europe and Russia designed to explore Mars for signs that life once existed, the ExoMars TGO will investigate the environment, and blaze a path for a future 2020s mission to return a sample of Martian terrain for planetary scientists to examine in detail for signs of life.
The ExoMars TGO completed its final trajectory maneuver at 08.:45 GMT on October 14 and at 14:42 GMT/16:42 CEST today the Schiaparelli module separated from the orbiter. Tomorrow around 02:42 GMT/04:42 CEST the robotic spacecraft will conduct an orbit-raising maneuver in preparation for orbit insertion and the descent of Schiaparelli to the surface of Mars at around 14:48 GMT/16:48 CEST. The module is scheduled to land in a region of Mars near the equator called MeridianiPlanum, where it will search for signs of life once having existed on the Red Planet.
Unfortunately, after the separation from the ExoMars TGO, the Schiaparelli module didn’t return telemetry (onboard status information) and only sent its carrier signal, which indicates it’s operational and waiting for commands. Mission control’s currently looking into this anomaly and a resolution to the problem’s expected within a few hours. You can check for updates to this on the ESA website here.
What’s next for ExoMars?
If everything goes as planned, mission control should get an update from the ExoMars TGO on October 20, along with images of the surface of the planet as Schiaparelli descended to Mars. Continuous updates from the orbiter and module are expected through the duration of the ExoMars TGO mission. The events of the mission will also be live streamed on the ESA website here, along with reports on Twitter using the hashtag #ExoMars.
An image of the surface of comet 67P/Churyumov-Gerasimenko worth a thousand words
Space news (solar system science: planetary science; cometary science) – 66 feet above the surface of comet 67P/Churyumov-Gerasimenko; in a controlled descent –
The image above is the last thing the OSIRIS narrow-angle camera aboard the European Space Agency”s (ESA)Rosetta spacecraft captured before it hit the surface of comet 67P/Churyumov-Gerasimenko at 4:19 a.m. PDT (7:19 a.m. EDT/1:19 p.m. CEST) on September 30, 2016. During this controlled crash landing of the first spacecraft in history to rendezvous and escort a comet as it orbits the Sun. Astronomers were able to conduct an additional study of the gas, dust and plasma environment close to the surface of the comet and take these high-resolution images.
The OSIRIS narrow-angle camera also captured the image shown at the top of the page from a height of around 10 miles (16 kilometers) from the surface of comet 67P/Churyumov-Gerasimenko. This image spans a distance of around 2,000 feet (614 meters) across the comet’s icy and volatile surface. Attempting to walk across such a surface as Bruce Willis and his drilling crew did in the movie Armageddon is going to be tricky at best.
It might seem like a waste to purposely crash the Rosetta spacecraft on comet 67P/Churyumov-Gerasimenko, but in the end, it’s probably the best solution. This comets headed out beyond the orbit of Jupiter, which is further from the Sun than the spacecraft has traveled before, and there wouldn’t be enough solar power to operate its systems. Communicating with the spacecraft’s also about to become difficult for a month, with the Sun being close to the line-of-sight between Earth and Rosetta during this time period.
Rosetta mission complete
Feel happy for Rosetta and team, they both did the job, and then some in the end. It took a decade of careful planning and travel to rendezvous with comet 67P/Churyumov-Gerasimenko and write history. Just one month and two days later, a smaller lander named Philae touched down on the surface of the comet. It bounced on the surface a few times, before finally setting down. During the next few days, it took the first images ever of a comet’s surface up close and sent back important data planetary scientists will use to look for clues to the role comets played in the formation of the planets 4.5 billion years ago. Clues they hope to use to learn more about the origin and evolution of our solar system and possibly the formation of solar systems in general.
Can blow star-forming gas 1000 light-years out of core region of host galaxies
Space news (astrophysics: evolution of galaxies; feedback mechanisms) – about 2.3 billion years ago in a galaxy far, far away and standing in a fierce, 2 million mile per hour (3 million kilometers per hour) outflow of star-forming gas –
Astrophysicists studying the evolution of galaxies using the Suzaku X-ray satellite and the European Space Agency’s Herschel Infrared Space Observatory have found evidence suggesting supermassive black holes significantly influence the evolution of their host galaxies. They found data pointing to winds near a monster black hole blowing star-forming gas over 1,000 light-years from the galaxy center. Enough material to form around 800 stars with the mass of our own Sol.
“This is the first study directly connecting a galaxy’s actively ‘feeding’ black hole to features found at much larger physical scales,” said lead researcher Francesco Tombesi, an astrophysicist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and the University of Maryland, College Park (UMCP). “We detect the wind arising from the luminous disk of gas very close to the black hole, and we show that it’s responsible for blowing star-forming gas out of the galaxy’s central regions.”
The artist’s view of galaxy IRAS F11119+3257 (F11119) above shows 3 million miles per hour winds produced near the supermassive black hole at its center heating and dispersing cold, dense molecular clouds that could form new stars. Astronomers believe these winds are part of a feedback mechanism that blows star-forming gas from galaxy centers, forever altering the structure and evolution of their host galaxy.
Astronomers have been studying the Monster of the Milky Way, the supermassive black hole with an estimated mass six million times that of Sol thought to reside at the center of our galaxy, for years. The monster black hole at the core of F11119 is thought to contain around 16 million times the mass of Sol. The accretion disk surrounding this supermassive black hole is measured at hundreds of times the diameter of our solar system. The 170 million miles per hour (270 million kilometers per hour) winds emanating from its accretion disk push the star-forming dust out of the central regions of the galaxy. Producing a steady flow of cold gas over a thousand light-years across traveling at around 2 million mph (3 million kph) and moving a volume of mass equal to around 800 Suns.
Astrophysicists have been searching for clues to a possible correlation between the masses of a galaxy’s central supermassive black hole and its galactic bulge. They have observed galaxies with more massive black holes generally, have bulges with proportionately larger stellar mass. The steady flow of material out of the central regions of galaxy F11119 and into the galactic bulge could help explain this correlation.
“These connections suggested the black hole was providing some form of feedback that modulated star formation in the wider galaxy, but it was difficult to see how,” said team member Sylvain Veilleux, an astronomy professor at UMCP. “With the discovery of powerful molecular outflows of cold gas in galaxies with active black holes, we began to uncover the connection.”
“The black hole is ingesting gas as fast as it can and is tremendously heating the accretion disk, allowing it to produce about 80 percent of the energy this galaxy emits,” said co-author MarcioMeléndez, a research associate at UMCP. “But the disk is so luminous some of the gas accelerates away from it, creating the X-ray wind we observe.”
When the supermassive black hole’s most active, it clears cold gas and dust from the center of the galaxy and shuts down star formation in this region. It also allows shorter-wavelength light to escape from the accretion disk of the black hole astronomers can study to learn more. We’ll keep you updated on any additional discoveries.
What’s the conclusion?
Astrophysicists conclude F11119 could be an early evolutionary phase of a quasar, a type of active galactic nuclei (AGN) with extreme emissions across a broad spectrum. Computer simulations show the supermassive black hole should eventually consume the gas and dust in its accretion disk and then its activity should lessen. Leaving a less active galaxy with little gas and a comparatively low level of star formation.
Astrophysicists and scientists look forward to detecting and studying feedback mechanisms connected with the growth and evolution of supermassive black holes using the enhanced ability of ASTRO-H. A joint space partnership between Japan’s Aerospace Exploration Agency (ISAS/JAXA) and NASA’s Goddard Space Flight Center, Suzaku’s successors expected to lift the veil surrounding this mystery even more and lay the foundation for one day understanding a little more about the universe and its mysteries.
Watch an animation made by NASA’s Goddard Space Flight Center showing how black hole feedback works in quasars here.
Forming rings of X-ray light that expand with time, creating a shooting target effect
Space news (astrophysics: binary star systems; black hole/sun-like star systems) – 8,000 light-years away toward the constellation Cygnus, next to flaring 10 solar mass black hole –
It all started just before 2:32 p.m. on June 15, 2015, when NASA’s Swift X-ray Burst Alert Satellite detected a rising wave of high-speed, extremely-energetic X-rays emanating from the direction of the constellation Cygnus. Additional detections of the same flare ten minutes later by a Japanese experiment on the International Space Station called the Monitor of All-sky X-ray Image (MAXI) and other detectors. Allowed astronomers to determine the outburst detected originated 8,000 light-years away in low-mass X-ray binary V404 Cygni, where previous data indicated a stellar-mass black hole and sun-like star orbited each other. A black hole and sun-like star binary system that up to this point had been sleeping since its last outburst in 1989.
Fifteen days later on June 30, a team of scientists from around the world led by Andrew Beardmore of the University of Leicester in the United Kingdom investigated V404 Cygni a little closer using NASA’s Swift X-ray Burst Alert Satellite. Images taken (above) revealed a series of concentric rings of X-ray light centered on a 10 solar mass black hole (dot at the center of image).
Astronomers believe the x-ray rings are the result of echoing x-ray light from a large flare on June 26, 2016, at 1:40 p.m. EDT. The flare emitted x-rays in all directions. Multiple dust layers at around 4,000 and 1,000 light-years from V404 Cygni reflected some of these x-rays towards Earth. This reflected light travels a greater distance and reaches us slightly later than light traveling a straighter path. The small time difference produced an x-ray echo, formed x-ray rings expanding in spacetime.
“The flexible planning of Swift observations has given us the best dust-scattered X-ray ring images ever seen,” Beardmore said. “With these observations, we can make a detailed study of the normally invisible interstellar dust in the direction of this black hole.”
The team is currently watching V404 Cygni, waiting for its next outburst, and preparing Swift to collect additional data to determine exactly what’s going on here. They hope to hit the bulls eye in human understanding of the collection on x-ray sources detected across the cosmos. Regular monitoring of this binary system using a suite of telescopes and instruments could give us clues to how a stellar-mass black hole and sun-like star end up orbiting each other. About the origin and formation of the unusual types of binary systems detected during the human journey to the beginning of space and time.
Study in space exploration collaboration between nations heading into the unknown
Space news (astrophysics & cosmology: x-ray astronomy; spectral resolution of supernovae, accreting binaries, active galactic nuclei, and galaxy clusters) – between 525 – 615 kilometers above the Earth, orbiting every 96 minutes while observing the x-ray universe –
Japan’s 4th cosmic x-ray space mission and the second collaboration between NASA and ISAS to launch into orbit around the Earth, the Advanced Satellite for Cosmology & Astrophysics (ASCA) opened a new window on the x-ray universe. Designed and engineered to conduct x-ray spectroscopy ASCA (formally Astro-D) paved a path for NASA’s Chandra X-ray Observatory, XMM-Newton and Japan’s Suzaku (Astro-EII) to study x-ray emissions across the night sky. This smaller eye on the x-ray universe was the perfect complement to ROSAT’s all-sky survey of around 150,000 x-ray sources and RXTE’s study of the different types observed. Making this little satellite an essential, pivotal mile marker during the human journey to the beginning of space and time. Combined, these space missions have an advanced human understanding of the high-energy universe and revealed mysteries keeping astronomers up at night and peering into the unknown x-ray universe at the cosmos beyond human imagination.
ASCA (Astro-D) launched from Japan’s Kagoshima Space Center at the southern tip of Japan on Kyushu island on February 20, 1993, aboard ISAS’s fourth generation Mu launch system M-3sII. Orbiting at a distance from Earth at perigee of 525 and 615 at apogee, it took only 96 minutes on average for Astro-D to complete one revolution of its nearly circular path around the planet. During a lifespan lasting nearly 8 years, Japan’s little x-ray satellite provided the first images of x-ray emitting objects and detected x-rays from supernova SN 1993J in galaxy M81. The data it supplied allowed astronomers to reveal clues to the origin and formation of accreting binaries, the accretion disks of active galactic nuclei, galaxy clusters, and supernovae.
A tough little satellite says goodbye
This tough little satellite operated until July of 2000 when fluctuations in solar activity caused Earth’s atmosphere to expand. ASCA experienced friction caused by the thinner atmosphere and fell into an uncontrolled spin. Minimal satellite operations continued until around 14:20 on March 2, 2001, when Astro-D fell deeper into the planet’s gravity well and disappeared. Bringing to a close a chapter in space history on a little satellite that opened a window to the x-ray universe and revealed clues to a weird, weird, weird cosmos beyond human imagination.