Pluto

Considered the ninth planet for nearly 75 years, the second biggest dwarf planet discovered in the solar system. Pluto was originally given the name of the Greek god of the underworld by 11-year-old Venetia Burney.

This is the most detailed view to date of the entire surface of the dwarf planet Pluto, as constructed from multiple NASA Hubble Space Telescope photographs taken from 2002 to 2003. The center disk (180 degrees) has a mysterious bright spot that is unusually rich in carbon monoxide frost. Pluto is so small and distant that the task of resolving the surface is as challenging as trying to see the markings on a soccer ball 40 miles away. Credit: NASA, ESA, and M. Buie (Southwest Research Institute). Photo No. STScI-PR10-06a
This is the most detailed view to date of the entire surface of the dwarf planet Pluto, as constructed from multiple NASA Hubble Space Telescope photographs taken from 2002 to 2003. The center disk (180 degrees) has a mysterious bright spot that is unusually rich in carbon monoxide frost. Pluto is so small and distant that the task of resolving the surface is as challenging as trying to see the markings on a soccer ball 40 miles away. Credit: NASA, ESA, and M. Buie (Southwest Research Institute). Photo No. STScI-PR10-06a

Space & Astronomy Wiki – the planets in the solar system –

The furthest of the original nine planets in the solar system from Sol at 3.7 billion miles (5.9 billion km) or 39.5 AU, Pluto is the second biggest dwarf planet behind Eris, which is about 28 percent more massive.

In 2005, this image from NASA's Hubble Space Telescope was used to identify two new moons orbiting Pluto. Pluto is in the center. The moon Charon is just below it. The newly discovered moons, Nix and Hydra, are to the right of Pluto and Charon. Credits: NASA, ESA, H. Weaver (JHU/APL), A. Stern (SwRI), and the HST
In 2005, this image from NASA’s Hubble Space Telescope was used to identify two new moons orbiting Pluto. Pluto is in the center. The moon Charon is just below it. The newly discovered moons, Nix, and Hydra are to the right of Pluto and Charon.
Credits: NASA, ESA, H. Weaver (JHU/APL), A. Stern (SwRI), and the HST

Orbited by moons Charon, Nix, Styx, Kerberos, and Hydra, Pluto was discovered on February 18, 1930, by Clyde W. Tombaugh. Charon is almost 50 percent the size of Pluto and is believed to be the result of a collision between a planet-sized object and the dwarf planet early in the history of the solar system.

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If the icy surface of Pluto's giant moon Charon is cracked, analysis of the fractures could reveal if its interior was warm, perhaps warm enough to have maintained a subterranean ocean of liquid water, according to a new NASA-funded study.
If the icy surface of Pluto’s giant moon Charon is cracked, analysis of the fractures could reveal if its interior was warm, perhaps warm enough to have maintained a subterranean ocean of liquid water, according to a new NASA-funded study.

With only 12, 173 miles (19, 591 km) between Pluto and Charon, astronomers and space scientists consider the pair to be a double planet system. The entire Pluto system is part of the distant Kuiper Belt, a distant disk-like region beyond the orbit of Neptune full of icy bodies formed during the early history of the solar system.

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NASA’s New Horizons spacecraft took this image of Pluto’s dark side with the Sun on the other side of this distant, lonely wanderer. Sunlight filters through and illuminates complex layers of atmospheric haze. Credit: NASA/New Horizons/JHUAPL/SwRI

A day on Pluto is about 153 hours long, which is the time it takes the dwarf planet to spin once on its axis, and a year, the time it takes this distant object it orbit the Sun, takes about 248 Earth years.

The structure of Pluto is not very well understood at present. Nevertheless, spectroscopic observation from Earth in the 1970s has revealed that the planet surface is covered with methane ice. Surface temperature is -230 degrees C, and the frozen methane exhibits a bright coloration. However, with the exception of the polar caps, the frozen methane surface is seen to change to a dark red on the basis of observation of eclipse by its moon Charon. Image Credit: Lunar and Planetary Institute
The structure of Pluto is not very well understood at present. Nevertheless, spectroscopic observation from Earth in the 1970s has revealed that the planet surface is covered with methane ice. Surface temperature is -230 degrees C and the frozen methane exhibits a bright coloration. However, with the exception of the polar caps, the frozen methane surface is seen to change to a dark red on the basis of observation of eclipse by its moon Charon.
Image Credit: Lunar and Planetary Institute

What are planetary scientists saying?

Some planetary scientists think Pluto could have an ocean hidden beneath its icy surface, but this cold and distant body isn’t thought to be a place life could exist. Scientists estimate this dwarf planet has three times as much water in the form of ice as contained within the oceans of Earth.

How big is Pluto’s atmosphere? This is not a typical question one finds in planetary science. Earth’s atmosphere has an equivalent thickness – the thickness if you compress the atmosphere to uniform pressure and density – of about 10 kilometers, or six miles. Compare this with the radius of Earth, 6,370 kilometers, and you see that the razor-thin thickness of Earth’s atmosphere is about 0.17% of its radius. Even if you consider the “outer limit” of Earth’s neutral atmosphere, what we call the exobase, that reaches about 600 kilometers altitude, the atmosphere’s equivalent thickness is only 10% of Earth’s radius—still very thin. So the volume of Earth’s atmosphere is tiny compared to Earth’s volume. Michael E. Summers is a professor of Planetary Science and Astronomy at George Mason University, and specializes in the study of the chemistry and dynamics of planetary atmospheres. He is a New Horizons co-investigator and member of the atmospheres science theme team.
How big is Pluto’s atmosphere? This is not a typical question one finds in planetary science. Earth’s atmosphere has an equivalent thickness – the thickness if you compress the atmosphere to uniform pressure and density – of about 10 kilometers or six miles. Compare this with the radius of Earth, 6,370 kilometers, and you see that the razor-thin thickness of Earth’s atmosphere is about 0.17% of its radius. Even if you consider the “outer limit” of Earth’s neutral atmosphere, what we call the exobase, that reaches about 600 kilometers altitude, the atmosphere’s equivalent thickness is only 10% of Earth’s radius—still very thin. So the volume of Earth’s atmosphere is tiny compared to Earth’s volume.
Michael E. Summers is a professor of Planetary Science and Astronomy at George Mason University and specializes in the study of the chemistry and dynamics of planetary atmospheres. He is a New Horizons co-investigator and member of the atmospheres science theme team.

The surface is also covered by frozen methane and nitrogen gas, which thaws as Pluto nears the Sun, forming a thin atmosphere composed primarily of nitrogen, carbon monoxide, with a little methane thrown in.

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NASA’s New Horizons spacecraft took this enhanced-color image of the southeastern region of Pluto’s great plains of ice called Sputnik Planum. At lower right these plains border rugged, dark highlands that rise 1.5 miles above them. Credit: NASA/JHUAPL/SwRI

NASA’s New Horizons spacecraft is the only human envoy to be sent to the Pluto system.

For more information on Pluto go here.

Follow New Horizons as it writes space history here.

Follow NASA’s New Horizons spacecraft as it closes in on Pluto and Charon and prepares to write space history.

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NASA’s Space Mission Shows ‘New Horizons’ of Pluto and Charon

The human journey to the beginning of space and time stops at Pluto and its largest moon Charon

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Space news (July 7, 2015) – 4.7 billion km (2.9 billion miles) from Earth and 24 million miles (39 million km) from dwarf planet Pluto and closing

NASA’s New Horizons spacecraft is operating according to plans and is ready to view a new dawn for the human journey to the stars!

NASA’s New Horizons spacecraft is presently accelerating across the solar system toward dwarf planet Pluto and its biggest moon Charon after nine years voyaging across the solar system. Expectations are for a smooth and historic pass by the former ninth planet and it’s family of five known moons at approximately 7:49 a.m. EDT on July 14, 2015.

Watch this video of Pluto and it’s biggest moon Charon taken on June 22, 2015.

Space scientists are looking forward to a better view of terrain types on the surface of the planet and Charon as New Horizons flies past. They especially want to look at a mysterious dark region viewed on its pole that seems to be a little unusual.

This system is just amazing,” said Alan Stern, New Horizons Principal Investigator, from the Southwest Research Institute, Boulder, Colorado. “The science team is just ecstatic with what we see on Pluto’s close approach hemisphere: Every terrain type we see on the planet—including both the brightest and darkest surface areas —are represented there, it’s a wonderland!

“And about Charon—wow—I don’t think anyone expected Charon to reveal a mystery like dark terrains at its pole,” he continued. “Who ordered that?”

“The unambiguous detection of bright and dark terrain units on both Pluto and Charon indicates a wide range of diverse landscapes across the pair,” said science team co-investigator and imaging lead Jeff Moore, of NASA Ames Research Center, Mountain View, California. “For example, the bright fringe we see on Pluto may represent frost deposited from an evaporating polar cap, which is now in the summer sun.

First Color Images of Pluto and Charon

First discovered on February 18, 1930, by astronomer Clyde Tombaugh, while working at the Lowell Observatory in Flagstaff, Arizona, the New Horizons spacecraft carries the ashes of the discoverer of Pluto to their historic up close meeting.

Charon first emerged from the shadow of Pluto on June 22, 1978, when discovered by US Naval Observatory astronomer James W. Christy and his colleague Robert Harrington.

There’s only on average 12,000 miles between Pluto and its moon Charon, which is over fifty percent of the size of the dwarf planet. Many astronomers and space scientists call this pair a double planet because of their close proximity in both distance and size.

This first color image of the dwarf planet Pluto and its moon Charon was taken on April 9, 2015, by the Ralph color imager on New Horizons, when it was about 71 million miles away. 

The Ralph imager on New Horizons took the first color image, seen here, of Pluto and Charon on April 9, 2015. Clearly visible are Pluto and Texas-sized Charon, the smaller dot. Credits: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
The Ralph imager on New Horizons took the first color image, seen here, of Pluto and Charon on April 9, 2015. Clearly visible are Pluto and Texas-sized Charon, the smaller dot.
Credits: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
This is the first movie created by New Horizons to reveal color surface features of Pluto and its largest moon Charon. “It’s a bit unusual to see so much surface detail at this distance,” said New Horizons co-investigator William McKinnon of the Geology and Geophysics Investigation Team, Washington University in Saint Louis. “What’s especially noteworthy is the level of detail in both bodies. It’s certainly whetting our appetite for what’s to come.” The images were taken between June 23 and June 29, 2015, as New Horizons’ distance to Pluto decreased from a distance of 15 million to 11 million miles (24 million to 18 million kilometers). Six high-resolution black-and-white images from New Horizons’ LORRI instrument were combined with color data from the Ralph instrument to produce the movie.
This is the first movie created by New Horizons to reveal color surface features of Pluto and its largest moon Charon. “It’s a bit unusual to see so much surface detail at this distance,” said New Horizons co-investigator William McKinnon of the Geology and Geophysics Investigation Team, Washington University in Saint Louis. “What’s especially noteworthy is the level of detail in both bodies. It’s certainly whetting our appetite for what’s to come.”
The images were taken between June 23 and June 29, 2015, as New Horizons’ distance to Pluto decreased from a distance of 15 million to 11 million miles (24 million to 18 million kilometers). Six high-resolution black-and-white images from New Horizons’ LORRI instrument were combined with color data from the Ralph instrument to produce the movie.

It’s exciting to see Pluto and Charon in motion and in color,” says New Horizons Principal Investigator Alan Stern of the Southwest Research Institute (SwRI), Boulder, Colorado. “Even at this low resolution, we can see that Pluto and Charon have different colors—Pluto is beige-orange while Charon is gray. Exactly why they are so different is the subject of debate.

Even though the latest images were made from more than 30 million miles away, they show an increasingly complex surface with clear evidence of discrete equatorial bright and dark regions—some that may also have variations in brightness,” says New Horizons Principal Investigator Alan Stern, of the Southwest Research Institute, Boulder, Colorado. “We can also see that every face of Pluto is different and that Pluto’s northern hemisphere displays substantial dark terrains though both Pluto’s darkest and its brightest known terrain units are just south of, or on, its equator. Why this is so is an emerging puzzle.

We’re squeezing as much information as we can out of these images, and seeing details we’ve never seen before,” said New Horizons Project Scientists Hal Weaver, from the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland. “We’ve seen evidence of light and dark spots in Hubble Space Telescope images and in previous New Horizons pictures, but these new images indicate an increasingly complex and nuanced surface. Now, we want to start to learn more about what these various surface units might be and what’s causing them. By early July, we will have spectroscopic data to help pinpoint that.

Pluto and its largest moon Charon seen from New Horizons on July 1, 2015. The inset shows Pluto enlarged; features as small as 100 miles (160 kilometers) across are visible. Credits: NASA/JHUAPL/SWRI
Pluto and its largest moon Charon as seen from New Horizons on July 1, 2015. The inset shows Pluto enlarged; features as small as 100 miles (160 kilometers) across are visible.
Credits: NASA/JHUAPL/SWRI

High Noon on Dwarf Planet Pluto

What would high noon on Pluto be like? You might think it would be a dark time, considering its distance from the Sun, but there’s more light present than you think. The light present for a brief moment during dawn and dusk on Earth would be like high noon on this distant body.

Want to experience high noon on dwarf planet Pluto? NASA has created a unique and entertaining interactive widget allowing users to experience this moment here. This new tool tells users the exact time you need to go outside to view high noon on this distant and mysterious object in space. 

The new tool also allows you to set reminders allowing you to schedule a session with your family or friends. Taking your children, wife, and interested friends along on your journey to Pluto’s, the best way to introduce people to the human journey to the beginning of space and time.

New Horizons Views Dwarf Planet‘s Four Small Moons

New Horizons recently provided this view of the two smallest and faintest of the five moons of Pluto; Nis, Styx, Hydra, Kerberos and the largest Charon as seen below. The mission is now within view of the entire family of this dwarf planet and in a few days time, we’ll get a close-up view of each member.

New Horizons is now on the threshold of discovery,” said mission science team member John Spencer, of the Southwest Research Institute in Boulder, Colorado. “If the spacecraft observes any additional moons as we get closer to Pluto, they will be worlds that no one has seen before.

The images of Kerberos and Styx above were taken using New Horizons Long Range Reconnaissance Imager (LORRI) between April 25 – May 1. If you look closely, Kerberos is also visible in the second image

Pluto and its largest moon Charon seen from New Horizons on July 1, 2015. The inset shows Pluto enlarged; features as small as 100 miles (160 kilometers) across are visible. Credits: NASA/JHUAPL/SWRI
Pluto and its largest moon Charon as seen from New Horizons on July 1, 2015. The inset shows Pluto enlarged; features as small as 100 miles (160 kilometers) across are visible.
Credits: NASA/JHUAPL/SWRI
These images, taken by New Horizons’ Long Range Reconnaissance Imager (LORRI), show four different “faces” of Pluto as it rotates about its axis with a period of 6.4 days. All the images have been rotated to align Pluto's rotational axis with the vertical direction (up-down) on the figure, as depicted schematically in the upper left.From left to right, the images were taken when Pluto’s central longitude was 17, 63, 130, and 243 degrees, respectively. The date of each image, the distance of the New Horizons spacecraft from Pluto, and the number of days until Pluto closest approach are all indicated in the figure. Credits: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
These images, taken by New Horizons’ Long Range Reconnaissance Imager (LORRI), show four different “faces” of Pluto as it rotates about its axis with a period of 6.4 days. All the images have been rotated to align Pluto’s rotational axis with the vertical direction (up-down) on the figure, as depicted schematically in the upper left.From left to right, the images were taken when Pluto’s central longitude was 17, 63, 130, and 243 degrees, respectively. The date of each image, the distance of the New Horizons spacecraft from Pluto, and the number of days until Pluto closest approach are all indicated in the figure.
Credits: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
These images are displayed at four times the native LORRI image size, and have been processed using a method called deconvolution, which sharpens the original images to enhance features on Pluto. Deconvolution can occasionally introduce
These images are displayed at four times the native LORRI image size and have been processed using a method called deconvolution, which sharpens the original images to enhance features on Pluto. Deconvolution can occasionally introduce “false” details, so the finest details in these pictures will need to be confirmed by images taken from closer range in the next few weeks. All of the images are displayed using the same brightness scale.
Credits: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

These images allowed space scientists to confirm the positions of the objects seen as an exact match for the predicted positions of Kerberos and Styx in relation to the Sun, the planets, and all mass bodies in the solar system.

For more information and facts concerning NASA‘s New Horizon mission go here

To learn more about NASA’s space mission go here.

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