A
planetary scientist is someone who studies and explores planets, moons, and other objects in space to understand how they formed, their composition, and how they have changed over time.
Full definition
If his plan is approved, the site would provide
planetary scientists with a working model of what to look for on the moon's surface.
The big question that
planetary scientists hope will be answered is: are there significant quantities of water ice on the moon?
A THIN plating of metallic compounds may explain puzzling radar reflections from the mountains on Venus, say
planetary scientists at Washington University in Saint Louis.
During those eight years, some 6,000 moonquakes, including dozens not previously detected, rumbled deep within the satellite,
say planetary scientists at the Scripps Institution of Oceanography in La Jolla, California.
These properties make the Dry Valleys so unusual that they more closely resemble Mars than they do most of Earth, and therefore make a great research station for
planetary scientists who can't yet buy a ticket to Mars.
Intrigued, Schneider took a summer job as a computer programmer
for planetary scientist S. I. Rasool, who asked him to model both grim scenarios.
Research
by planetary scientists at Brown University finds that periodic melting of ice sheets on a cold early Mars would have created enough water to carve the ancient valleys and lakebeds seen on the planet today.
Now
planetary scientists from MIT and the Harvard - Smithsonian Center for Astrophysics have identified key ingredients that were present in large concentrations right around the time when the first organisms appeared on Earth.
But when NASA's MESSENGER spacecraft detected lots of sulfur and potassium in the crust of Mercury earlier this year, many
planetary scientists believed this ruled out the giant - impact scenario for the innermost planet.
The eastern part of Ligeia Mare averages from 20 to 40 meters in depth, says Alexander Hayes, a Cornell
University planetary scientist who reported the discovery November 10 at the American Astronomical Society's Division for Planetary Sciences meeting.
«There are a number of mechanisms that could explain the presence of crystalline water ice on the surface of Charon,» said Jason Cook, the PhD student at Arizona State University who led the team of
planetary scientists studying the surface of Charon.
«But the mechanism on Saturn has to be different,» says
Caltech planetary scientist Andrew Ingersoll, a member of the Cassini imaging team.
At the urging of
planetary scientist Richard Morris of the NASA Johnson Space Center in Houston, who works on Spirit's Mössbauer gamma - ray spectrometer, Ruff's group went back to review its data from the Comanche outcrops.
It has collected five of the 18 specimens identified as coming from Mars, including the specimen ALH84001, collected in 1984 and made famous in 1996 when NASA investigators suggested that secondary materials in the cracks of the meteorite might have been created through processes involving life — although most
planetary scientists now think otherwise.
That team, led by Brown University
planetary scientist John Mustard, has now delivered a report that lays out what the next rover should be equipped to do.
That's a hypothesized storm of comets and (in the inner solar system) asteroids that many
planetary scientists think pummeled the solar system 3.9 billion years ago.
However, its large outermost planet could have long ago swept that vicinity clean of planetary material, notes
planetary scientist Jonathan Lunine of the University of Arizona at Tucson.
Caltech astronomer Mike Brown and NASA
planetary scientist Kevin Peter Hand have discovered a new chemical «fingerprint» on Europa's surface indicative of life: magnesium sulfate.
First,
planetary scientists suspect that cyanide was abundant on early Earth, deposited here by comets or created in the atmosphere by ultraviolet light or by lightning (once the atmosphere became oxygen rich, 2.5 billion years ago, the process would have stopped).
Now, as
planetary scientists report online today in Science, the second spacecraft to Mercury has found that this magnetic field formed billions of years ago.
When planetary scientists started studying the photographs and data from Voyager and the subsequent Galileo mission that studied the Jovian system during the 1990s and early 2000s, they confirmed this notion: these ridges, or lineae, are fructures, or cracks, on Europa's icy surface, caused be the intense tidal forces of the massive, nearby Jupiter and the orbital resonances with the other nearby moons.
There's not enough pollution in the rings for them to have been around for a long time, argues
planetary scientist Paul Estrada of the SETI Institute in Mountain View,
«You see exactly the same kind of wind tails behind mountains and dune fields in places like Namibia and the Arabian Desert,» explains University of Arizona
planetary scientist Ralph Lorenz.
Some old - school
planetary scientists still fear that someone will abuse «their» data, but the Mars rover missions have demonstrated that sharing raw images is a win - win situation, as those who work with such images are also the best PR people a mission can wish for.
Now, a team led by
planetary scientist Steve Miller of the University College London has caught the first glimpse of an electrojet with NASA's Infrared Telescope Facility on Mauna Kea.
Between 4.4 and 4.5 billion years ago, Earth may have had not just one moon but two,
argued planetary scientist Erik Asphaug of the University of California, Santa Cruz.
The new theory, set forth by
planetary scientist Robin Canup of the Southwest Research Institute in Boulder, Colorado, and published online today in Nature, explains the ice - rich composition of the rings and accounts for the odd characteristics of some of Saturn's smaller moons.
There's only one extra here, but it's a good one: The Second Genesis: The Search for Life Beyond Earth bonus documentary (HD — 18:26), which features
planetary scientist Carolyn Porco's fascination with the idea of finding life elsewhere in our Solar System and designing a NASA mission to find it.
Rocky bodies may become synestias several times before settling into a permanent planet shape, say
planetary scientists Simon Lock of Harvard University and Sarah Stewart of the University of California, Davis.
In the Solar System, the asteroid belt contains the leftover building blocks for the terrestrial planets Mercury, Venus, Earth, and Mars,
so planetary scientists study the asteroids to gain a better understanding of how rocky, and potentially habitable planets are formed.
The cost of JWST «is obviously a factor» in the ExoMars problems, says
planetary scientist Mark Sykes of the Planetary Science Institute in Tucson, Arizona.
«We really don't know, because spectrographs work well with light from gases, not droplets of liquid like those in the Jovian clouds,» says Caltech
planetary scientist Andrew Ingersoll.
But just how unpleasant has become the subject of renewed debate among
planetary scientists trying to understand the planet's enigmatic topography.