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.
Space news (The search for life beyond Earth) – An artist’s rendition of the Europa spacecraft orbiting Jupiter–
NASA’s Jet Propulsion Laboratory released this artist‘s rendering of the Europa spacecraft, which is set to head to Jupiter sometime in the 2020s. The Europa Mission spacecraftconfiguration in early 2016 is shown in this image. The final spacecraft configuration at launch could easily be different, so stay tuned here for more news. The position of Jupiter in the sky relative to Europa and the spacecraftare also off in this drawing.
Two large solar arrays are shown extending from the sides of the Europa spacecraft to which the ice-penetrating radar antennas are attached in this artist’s rendition. On the side of the craft, a saucer-shaped high gain antenna is depicted next to a magnetometer boom. On the forward section is a remote-sensing palette with the remaining science instruments.
The Europa Mission profile has a very capable, radiation-resistant spacecraft traveling to Jupiter, where it enters into a long, looping orbit of the giant planet in order to perform at least 45 repeated flybys of Europa at altitudes ranging from 1700 miles to 16 miles (2700 kilometers to 25 kilometers) above its surface. Planetary scientists want to take a closer look at the evidence for an ocean of liquid water beneath its icy shell. An ocean of liquid water that could be the habitat of alien lifeforms we want to get to know better.
12,000 square miles of thick icy material forced under another ice shell
Space news – (Europa) – Planetary space geologists have looked for years for telltale signs of plate tectonics occurring elsewhere in the solar system, other than Earth. Indications of this geological process taking place on other planetary bodies could mean the processes geologists observe here are possibly common in the solar system.
Recently, space scientists looking at images taken of Europa by NASA’s Galileo spacecraft during a flyby in the early 2000s, discovered unusual geological features they believe indicates the process of plate tectonics is taking place on the surface. You can learn more about Europa and view the images here
Image Credit: Noah Kroese, I.NK
Planetary space geologist Simon Kattenhorn, working at the University of Idaho, and Louise Prockter, of Johns Hopkins University Applied Physics Laboratory, discovered geological boundaries indicating the surface of Europa had recently shifted significantly in the northern latitudes.
Planetary space geologists see areas in the northern latitudes of Europa where the new ice crust has thrust up from below and then spread into bands miles wide. This planetary space geologists believe occurs in a process possibly similar to seafloor spreading on Earth, which is part of the theory of plate tectonics. Plate tectonics, or continental drift, is the theory the Earth’s crust and upper mantle, or lithosphere, is composed of slowly drifting tectonic plates of various sizes.
On our home planet, while new sea floor is forming at mid-ocean ridges, old surface is annihilated at subduction zones. Subduction zones are surface areas where two tectonic plates meet and then overlap as one is pushed beneath the other. Despite the mile wide bands of the new surface on Europa, however, planetary space geologists couldn’t understand how the top layer was able to accommodate the volume of new crust being formed.
“We have been puzzled for years as to how all this new terrain could be formed, but we couldn’t figure out how it was accommodated,” said Prockter. “We finally think we’ve found the answer.”
Planetary space geologists rearranged the Galileo images they were looking at into their original positions to get a view of these new surface regions before they moved. They found 12,000 square miles (almost 20,000 square kilometers) of the old surface area in the northern latitudes was gone.
Planetary geologists also saw ice volcanoes erupting on the surface in the regions in question in the images, which they think could be formed due to the melting and absorption of one icy plate as it’s pushed beneath another at a subduction zone.
“Europa may be more Earth-like than we imagined if it has a global plate tectonic system,” Kattenhorn says. “Not only does this discovery make it one of the most geologically interesting bodies in the solar system, it also implies two-way communication between the exterior and interior — a way to move material from the surface into the ocean — a process which has significant implications for Europa’s potential as a habitable world.”
Astronomy news (2013-12-22) – Galileo might have dreamed of unseen life forms existing in a watery soup under the icy surface of Europa when he first discovered Jupiter had moons on January 07, 1610. NASA astronomers working with the Hubble Space Telescope probably had similar thoughts when they recently saw images of what appears to be water geysers erupting from the south pole of Europa. The image above shows an artist’s conception of what astronomers and scientists believe is plumes of water vapour reaching over 100 miles into space from the south pole of Europa.
Are there life forms or maybe just organic material of some type existing on this watery moon? NASA astronomers, space scientists and interested people around the world are hoping this news will spur NASA officials and congress to provide them with the resources they need to fund the Europa Clipper (a NASA mission designed to travel to Europa to see if the conditions required for life exist).
“If there’s a geyser 200 kilometers tall, and you could fly a spacecraft through it and sample the water coming out from Europa, that would be phenomenal. What if there are organics in it? That’s getting to the question of ‘Are we alone in the universe?’ ” said John Grunsfeld, NASA’s top official for space science. “A subsurface ocean at Europa potentially provides all conditions for microbial life — at least life we know,” says study lead author Lorenz Roth, a planetary scientist at the Southwest Research Institute in San Antonio, Texas.
Astronomers are currently taking a look at earlier data concerning Europa provided by the Voyager probes during the 1980s and Galileo spacecraft during the 1990s to see if they missed something. Astronomers and planetary scientists suspected back in the 1980s, when they first obtained the data from the Voyager probes, that Europa could have an ocean of water beneath its icy crust deeper and more massive than all of the oceans of Earth. The Galileo spacecraft also detected the magnetic signature of a subsurface ocean beneath the surface ice of Europa and brown regions on the ice planetary scientists think could be due to ice crystals containing possible organic material, formed from water vapor plumes like the ones recently viewed, being deposited on the surface of the moon.
Astronomers are also comparing this data to more recent information concerning Europa, they obtained last year through the repaired Hubble Space Telescope, to see if they can find the telltale signature of hydrogen and oxygen they’re looking for in the data. Water is composed of hydrogen and oxygen and this signature will help astronomers and planetary scientists determine if plumes of water vapour are in fact coming from Europa’s southern hemisphere.
“As it hit the vacuum of space, the water would flash freeze and some of it would turn into water vapour. Those water molecules would be split into atomic hydrogen and oxygen in the harsh radiation environment of the Jupiter system. But it wouldn’t just be water in the plume: Whatever else was in that ocean would be squirted into space, too, said James Green, head of NASA’s planetary science division. For a planetary scientist, it’s huge,” Green said of the news.
The image above shows spikes in hydrogen and oxygen levels in two southern hemisphere regions on Europa’s surface that last for brief periods of about seven hours and coincide with the moon reaching its farthest point from Jupiter in its orbit. Astronomers and planetary scientists think current computer models suggest the images obtained through the Hubble Space Telescope could show plumes of water vapour over a hundred miles high streaming into space from the surface of Europa. It remains puzzling to astronomers and scientists why the water vapour plumes seem to coincide with Europa reaching its apocenter, since this is the moment when tidal forces on the moon are at a low point (Astronomers estimate these tidal forces can be over 1,000 times stronger than the tidal forces our own moon experiences due to Earth). Current ideas include the thought that maybe the surface cracks on Europa’s southern pole open once Jupiter’s gravity starts to lessen, allowing water vapour to squeeze out in jets reaching over a hundred miles into space.
Astronomers and planetary scientists at NASA suggest Europa’s plumes are probably like geysers they found on Saturn’s moon Enceladus, which also seem to appear when the moon reaches its apocenter. They’re excited about this discovery because Europa is only about half as far from Earth than Enceladus, which will allow the Hubble Space Telescope to have a closer look, this time. They hope to be able to use this fact to confirm the discovery of water on Europa and Enceladus and possibly get some quantitative data on the size, density, composition and timing of the plumes. Analysis of the composition of the plumes should also give them the data they need to model the interior of the moon, without having to land on the surface and drill holes.
The implications of the discovery of water on both Enceladus and Europa is stunning to contemplate for human beings, astronomers, and planetary scientists. We believe the human journey to the beginning of space and time should voyage to both of these moons in the future to determine if the ingredients for life exist on these distant bodies. We need to do this for science, mankind and future generations of humanity.
The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency. NASA’s Goddard Space Flight Center in Greenbelt, Md., manages the telescope. The Space Telescope Science Institute (STScI) conducts Hubble science operations. The Association of Universities for Research in Astronomy Inc. in Washington operates STScI for NASA.
To view the images of the evidence for plumes visit: