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updated Tue. May 1, 2018

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In fact, as Jackson pointed out, 'Oumuamua's orbit has the highest eccentricity ever observed in an object passing through our Solar System. Major questions about 'Oumuamua remain. For planetary scientists like Jackson, being able to observe objects like these may yield important clues about how planet ...
Vast oceans on Mars formed thousands of millions of years earlier than previously thought, according to a new study by planetary scientists. Oceans on Mars Two views of Mars show the early ocean known as Arabia (left), as it was 4 billion years ago, and the newer Deuteronilus ocean (right), about 3.6 ...

The Gravity Assist Podcast is hosted by NASA's Director of Planetary Science, Jim Green, who each week talks to some of the greatest planetary scientists on the planet, giving a guided tour through the Solar System and beyond in the process. This time, Green talks to NASA's Laurie Cantillo of the Science ...
For planetary scientists like Jackson, being able to observe objects like these may yield important clues about how planet formation works in other star systems. "The same way we use comets to better understand planet formation in our own Solar System, maybe this curious object can tell us more about ...
Most planetary scientists agree that our Moon was created when a planet-sized body hit Earth after it had almost completely formed. But they seem to disagree on nearly everything else. Now, a group of researchers has come up with an idea that upends that so-called “Big Splat” theory: If the giant impact ...
The Gravity Assist Podcast is hosted by NASA's Director of Planetary Science, Jim Green, who each week talks to some of the greatest planetary scientists on the planet, giving a guided tour through the Solar System and beyond in the process. This week, he is joined by Dr Jared Espley, who is a planetary ...

Despite the fact that astronomers have been observing Mercury with telescopes for centuries, how much do we really know about this strange world? The planet Mercury lies closest to the Sun, orbiting every 88 days. This tiny, crater-ridden world has intrigued planetary scientists for decades, housing water ...
Planetary scientists have noticed that Jupiter's most distinctive feature — the Great Red Spot (GRS) — has been getting smaller in area over time. Because of this, many expected to see the wind speeds inside the GRS increasing as the storm was shrinking. But surprisingly, this isn't the case — the wind ...
Artist's concept of NASA's New Horizons spacecraft flying by 2014 MU69 on Jan. 1, 2019. Early observations hint at the Kuiper Belt object being either a binary orbiting pair or stuck together pair of like-sized bodies with diameters near 12…
The Gravity Assist Podcast is hosted by NASA's Director of Planetary Science, Jim Green, who each week talks to some of the greatest planetary scientists on the planet, giving a guided tour through the Solar System and beyond in the process. This week, he is joined by lunar expert Sarah Noble to discuss ...
"When planetary scientists found that, wow, Neptune and Uranus seem to be mostly stuff like water and methane, they called them 'ice giants,'" Hofstadter explains. But the name is misleading, because today there is very little ice in those planets. "When they formed, the water was probably coming in as ice ...
Just as the decades-old moon samples brought back by NASA's Apollo missions are still being studied today, the asteroid samples returned from Bennu could offer planetary scientists an unprecedented trove of material that they could study for decades to come. Asteroids like Bennu are space fossils — the ...
NEW ORLEANS —Despite President Trump's declared intention to send human explorers to the moon before Mars, astronomers and planetary scientists remained wary. While some expressed their enthusiasm for the plan, others questioned whether it would ever become a reality. "It's all hot air until ...
Images of Pluto provided by the New Horizons mission reminded many planetary scientists of the frozen planet Hoth in "Return of the Jedi" (1983). Minor planet 4-Vesta has craters large enough for the Millennium Falcon to navigate through. In 2011, NASA's Kepler mission discovered a planet 196 light ...
These are just a handful of the hundreds of mysterious features across our solar neighborhood that beg to be studied closer. A lidar image of mysterious features on Earth called a Carolina bays. These depressions dot the entire East Coast of the United States, they're all oriented in the same direction, and ...
It's a question many planetary scientists have been asking NASA for almost three decades. The last time the agency sent a spacecraft there was 1989, when five astronauts deployed the Magellan probe from space shuttle Atlantis. Magellan rode an attached rocket booster to Venus, arriving in 1990 for a ...
The planetary scientists speculate that the scorching temperatures on Venus might heat the crust enough to allow some parts to detach slightly from the underlying mantle, creating thin crustal blocks that can “jiggle” around, just like on Earth. “It may help us understand how plate tectonics gets started,” says ...

Planetary scientists have examined samples from the moon, other planets, meteorites and comet comas — the gaseous envelope. Even interplanetary dust particles can't escape NASA's scrutiny as they rain down on Earth from space — NASA collects those dust particles on special sticky sheets on aircraft ...
... typically caused by flows of water — for example, how the gullies on Earth are shaped — has proved a mystery to planetary scientists.
ESA astronaut Matthias Maurer communicates with planetary scientists to discuss interesting geological sampling sites during the first ESA ...
Although Titan's surface is far too cold for liquid water, some planetary scientists say that geothermal activity may create hotspots where a slurry ...
"Whilst planetary scientists already know that the surface of Mars has 'mass-wasting' features – such as dune flows, gullies, and recurring slope ...
It could mean more dangerous cyclones, hurricanes and storms on Earth, according to a team of planetary scientists who are applying their ...
This week, Franck Marchis was live from the Division of Planetary Sciences meeting with planetary scientists. Cynthia Philips, Jim Bell and Hal ...
Now, according to a recent study published in Nature Geoscience, a team of UCLA planetary scientists and geologists found that these ...
The community includes physicists, chemists, biologists, Earth and planetary scientists, and engineers, as well as historians of science and ...
Planetary scientists have long suspected that the huge moon Triton is an interloper from outside the Neptune system. Now they have calculated ...
Showalter is looking to get the public involved and excited about the new phase of New Horizons, but for some reason, planetary scientists also ...
Planetary scientists study these rocks to extract clues as to how our solar system formed. But this work is complicated by the fact that we don't ...
The experiment offers new insight to planetary scientists who want to understand more about the atmosphere of these planets and exoplanets like them.
Do you have any advice for young women who are interested in becoming planetary scientists or working in STEM fields more generally?
Green and his fellow planetary scientists are equally concerned about making sure any Mars rocks returned to Earth are handled safely.
But some planetary scientists aren't losing too much sleep over the debate. Jim Kasting, a geoscientist at Pennsylvania State University in State ...
Planetary scientists, including asteroid expert Vishnu Reddy of the UA, decided to use the event to prepare for a real impact. “While the risk is ...
In a paper recently published to Nature Geoscience, a team led by French planetary scientists discovered more details about the planet's ...
This work will benefit not only planetary scientists seeking to understand the conditions inside our own local ice giants, but those studying ...
A group of planetary scientists studying Mars' atmosphere have finally obtained proof that it snows on the red planet. The snowstorms don't ...
Fueled by strong coffee and blue- and green-frosted doughnuts, a small army of astrophysicists, astronomers and planetary scientists cheered ...
As you probably know, NASA recently announced plans to send a mission to Jupiter's moon Europa. If all goes well, the Europa Clipper will blast off for the world in the 2020s, and orbit the icy moon to discover all its secrets.
This new definition would be tailored to planetary scientists, not astronomers. Mike Brown, the astronomer who pressed for the reclassification of Pluto to dwarf planet status, was one of the discoverers of Eris, which could have been seen as the 10th ...
Cassini is expected to return a library of new detailed images of the rings in the coming months, which will help planetary scientists learn more about the mysterious patterns. The spacecraft's ring-grazing orbits began last November, and will continue ...
But this definition sidelines the research interests of most planetary scientists, said the paper's lead author, Kirby Runyon, a doctoral candidate at Johns Hopkins University.
He believes astronomers had no business voting on what constitutes a planet in the first place: "We're called planetary scientists because we study planets. It's part of the title of our profession. We know what we're doing." Piero Benvenuti, general ...
THE WOODLANDS, Texas -- Planetary scientists expressed their displeasure this week with President Trump's recently proposed federal budget, despite the increase of funding it would provide their field.
But this definition sidelines the research interests of most planetary scientists, said the paper's lead author, Kirby Runyon, a doctoral candidate at Johns Hopkins University.
That is important because planetary scientists use crater counts on other worlds to help determine how old their surfaces are, based on the numbers and sizes of objects that have hit the surface since it formed.
The decision was made at a meeting of the International Astronomical Union, but many planetary scientists were not attendance.
NASA's record-high proposed planetary science budget didn't quell the fears scientists have about cuts to Earth sciences. Moon Earth casts a shadow on the Moon during a partial lunar eclipse viewed from Hobart, Australia, on 26 June 2010.
But this definition sidelines the research interests of most planetary scientists, said the paper's lead author, Kirby Runyon, a doctoral candidate at Johns Hopkins University.
Researchers expect their findings - detailed in the journal Nature Communications - to force geophysicists and planetary scientists back to the drawing board. Earth's core can't explain its unique iron isotopic ratio. "The solution to this mystery ...


 

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