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planetary science

Impact craters and their broader structures can be visible in a geologic map, like a bullseye. But what geophysical traces remain at the structure’s outermost edges?

Earth’s most ancient impact craters are disappearing

NASA’s Perseverance Mars rover uses SHERLOC – one of several instruments on the end of its robotic arm – to study rocks in an area nicknamed “Skinner Ridge.” Credit: NASA/JPL-Caltech/ASU/MSSS

NASA’s Perseverance Rover Sees Mars in a New Light

Image of the Terra Sirenum and its gullies captured by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.

Gullies on Mars could have been formed by recent periods of liquid meltwater

SwRI contributed to new Cycle 1 JWST findings that show the plume of water escaping from Saturn’s moon Enceladus extends 6,000 miles or more than 40 times the moon’s size. In light of this discovery, SwRI’s Dr. Christopher Glein was awarded a NASA JWST Cycle 2 allocation to study the plume as well as the icy surface of Enceladus, to better understand the potential habitability of this ocean world.

Saturn’s Moon Enceladus Throws Water Party Visible from Space

The panet Saturn with its trademark rings

Saturn’s rings are really young and mostly water

Artist’s concept of the planet GJ 1214 b, a “mini-Neptune” with what is likely a steamy, hazy atmosphere. Credit: NASA/JPL-Caltech/R. Hurt (IPAC)

Planet has surprisingly cool attitude: ‘I’m not hot, I’m just reflective’

New modeling shows that there likely is an ocean layer in four of Uranus’ major moons: Ariel, Umbriel, Titania, and Oberon. Salty – or briny – oceans lie under the ice and atop layers of water-rich rock and dry rock. Miranda is too small to retain enough heat for an ocean layer. Credit: NASA/JPL-Caltech

Uranus Moons Hide Watery Secrets

ZTF and NEOWISE spot evidence for the first known case of a star engulfing its planet

Star Eats Planet, Brightens Dramatically

Mars and water

Rover finds evidence of water at low latitudes on modern Mars

The new global mosaic, shown in a detail example at left, is stitched together with images taken by MRO's Context Camera, which captures the Martian surface in long strips.

Scientists Unveil a 5.7 Terapixel Global Image of Mars

Members of NASA’s OSIRIS-REx curation team work with a glove box at the agency's Johnson Space Center in Houston. The curation team will be among the first to see and handle the sample OSIRIS-REx is returning from asteroid Bennu. They are also responsible for storing and distributing the sample to science team members around the world. Most of the sample will be stored for future generations.

NASA prepares for historic asteroid sample delivery

Figure 1: A Relict Glacier near Mars’ Equator. (NASA MRO HiRISE and CRISM false color composite. Lee et al. 2023).

Glacier near Mars equator implies water possibly present today

Solar system montage of the nine planets and moons of Jupiter in our solar system.

The planet that could end life on Earth

Mimas’ heavily cratered surface (left) suggests a cold history, but its librations rule out a homogeneous interior. Rather, Mimas must have a rocky interior and outer hydrosphere, which could include a liquid ocean (Option A) or be fully frozen with an irregularly shaped core (Option B). An ocean provides a better fit to the phase of the libration but is difficult to reconcile with Mimas’ geology.

More evidence that Saturn’s moon Mimas is a stealth ocean world

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