You are browsing the archive for planetary science Archives - AGU Blogosphere.
25 November 2022
28-Fire: Does a planet need life for fire to burn?
Think about what types of things burn: wood, grasses, fossil fuels… mostly things that were formed by life. Fire also requires oxygen, which is largely produced by life. Did Earth have fire before life evolved? Could any other planets have fire? If there were an exoplanet with fires burning, would we have any way to detect that?
1 July 2022
10-Extinctions: Showdown of the giant space rocks
Dani DellaGiustina is one of the youngest leaders of a NASA mission, and she was in charge of image processing for OSIRIS-REx before she even got her PhD. OSIRIS-REx is a spacecraft sent to study asteroid Bennu and scheduled to return a sample to Earth in 2023.
3 June 2022
6.5-Extinctions: Dinosaurs, volcanoes, the space station, oh my!
Join us for our next six-part miniseries on Extinctions as we learn about the demise of the dinosaurs, what makes a comet “extinct,” the Cambrian and Triassic periods, volcanoes, and the aforementioned (planned) fiery end of the International Space Station!
6 May 2022
3-True story: A Martian on Earth
Tanya Harrison never thought she was going to be an astronaut. But she was determined to go to space. And she did just that – through satellites, first to Mars, and now looking back at our own third rock from the Sun as she uses satellites to map places near and far. We talked with her about what it’s like to be a Martian, making science more accessible to those …
22 April 2022
True (science) stories you’ve never heard before
Third Pod from the Sun is back, and we’re going weekly! Join us as we combat misconceptions about sharks, learn how to lasso lizards, hear from a Martian here on Earth, spark science joy via Tiktok, journey to Antarctica, and fight over food with some capuchins!
27 April 2021
What’s It Like Pretending to Live on Mars?
If someone offered you the chance to drop everything, fly to Hawaii, and spend four months trapped in a dome with seven strangers in the name of science, would you do it? For writer Kate Greene, the answer to that question was a resounding “yes.” Greene was one of eight people selected to crew the very first HI-SEAS Mars analogue mission in 2013.
12 October 2020
Final Frontier? The Evolution of Planetary Science Missions
The latest episode of Third Pod from the Sun features an interview with planetary scientist Fran Bagenal, who has had a fascinating career working on NASA missions from Voyager to Juno and New Horizons. Currently working at the University of Colorado Boulder, Bagenal provides an overarching view of the different planetary missions going back a few decades and describes how the research and findings have built upon the innovations and discoveries that came before.
12 May 2020
New evidence of watery plumes on Jupiter’s moon Europa
Scientists are keen to explore beneath Europa’s thick blanket of ice, and they can do so indirectly by hunting for evidence of activity emanating from below. A new study published in the AGU journal Geophysical Research Letters, did exactly this.
Sounding Saturn’s depths with its seismic icy rings
The secrets of Saturn’s veiled interior are leaking out by way of the planet’s spectacular rings, according to a line of research that has taken four decades to come to fruition. In the last few years, what was first considered a sort of wacky hypothesis – that scientists can use Saturn’s rings to learn about its structure — has turned into a singular window into Saturn’s surprisingly fluid and leviathan depths.
14 January 2020
Final images from Cassini spacecraft
For the last leg of its journey, Cassini was put on a particularly daring orbit passing between Saturn and its rings which brought it closer to Saturn than ever before. This allowed scientists to obtain images of Saturn’s ultraviolet auroras in unprecedented resolution. The new observations are detailed in two new studies published in the AGU journals.
3 December 2019
New study finds the mix that makes Titan’s lakes spew nitrogen bubbles
In a new study published in AGU’s journal Geophysical Research Letters, researchers simulated Titan’s lakes in a pressurized chamber. They found the right combination of methane, ethane and nitrogen crucial for bubbles to form. It is possible these bubble outbreaks are strong enough to shape river deltas in bodies of liquid on the moon.
1 October 2019
Water distribution affects exoplanets’ habitable zone
A new study finds land planets, which have equal to or less than 10 percent of the volume of Earth’s water, can remain habitable at a closer distance to their host star if most of their water is at the planet’s poles. This means the habitable zone for these types of planets may be different than previously assumed.
23 September 2019
Ice islands on Mars and Pluto could reveal past climate change
Many of the craters of Mars and Pluto feature relatively small ice islands unattached to their polar ice caps. These ice islands could be records of past climate change on Mars and Pluto, and could also provide clues about the workings of Martian water and ice, according to a new study in AGU’s Journal of Geophysical Research: Planets.
New study complicates theory that ancient impact pierced Moon’s crust
A new study finds the crater’s crust mainly consists of a common lunar crustal mineral not detected in earlier analyses. The new results suggest the basin floor may not have exposed lunar mantle material as previously reported. “We are not seeing the mantle materials at the (Chang’E 4) landing site as expected,” said Hao Zhang, a planetary scientist at the China University of Geosciences, Wuhan, China, and a co-author of the new study.
18 September 2019
New study suggests gigantic masses in Earth’s mantle untouched for more than 4 billion years
Ancient, distinct, continent-sized regions of rocks, isolated since before the collision that created the Moon 4.5 billion years ago, exist hundreds of miles below the Earth’s crust, offering a window into the building blocks of our planet, according to new research.
5 September 2019
Making sense of Saturn’s impossible rotation
Saturn may be doing a little electromagnetic shimmy and twist which has been throwing off attempts by scientists to determine how long it takes for the planet to rotate on its axis, according to a new study.
3 September 2019
Mercury’s ancient magnetic field likely evolved over time
Mercury’s ancient magnetic poles were far from the location of its poles today, implying its magnetic field, like Earth’s, changed over time, a new study says.
25 June 2019
Ice-squeezed aquifers might create marsquakes
As the Mars InSight lander begins listening to the interior of Mars, some scientists are already proposing that some marsquakes could be signals of groundwater beneath the frozen surface of the Red Planet. The idea, proposed by Michael Manga, a planetary scientist at the University of California at Berkeley, and his colleagues, is that Mars could be experiencing quakes a lot like those being felt in Oklahoma and Texas due to wastewater injections from fracking.
18 April 2019
The Moon’s crust is really cracked
The bombardment of asteroids and meteoroids that pockmarked the Moon’s surface over the eons also created fractures reaching deep into the lunar crust, report researchers in a new study in AGU’s Journal of Geophysical Research: Planets.
26 February 2019
New map reveals geology and history of Pluto’s moon Charon
What a difference a planetary flyby makes. Pluto’s moon Charon — once no more than a fuzzy blob of pixels beside a larger blob — now has its first geological map, published in AGU’s Journal of Geophysical Research: Planets.
