News

The Snowy Start to Enceladus’ Tiger Stripes Explained

This image of the Tiger Stripes  is a composite of the images taken from the CASSINI mission.

Since the Cassini spacecraft first brought the stripes to the world’s attention in 2005, planetary scientists have posited several explanations for their formation. Hemingway’s model is the first of these to simultaneously answer the following five key questions: (1) How do the fissures form? (2) Why do they form in a parallel set? (3) Why are they each around 35 kilometers apart? (4) Why do they appear on the south pole? And, (5) Why are they found only on Enceladus?

To answer these questions and understand why he chose to study the Tiger Stripes, we spoke with Hemingway.

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How Enceladus Got Its Stripes

Image Credit: NASA, ESA, JPL, SSI, Cassini Imaging Team

Saturn’s icy moon Enceladus is of great interest to scientists due to its subsurface ocean, making it a prime target for those searching for life elsewhere. New research led by Carnegie’s Doug Hemingway reveals the physics governing the fissures through which oceanwater erupts from the moon’s icy surface, giving its south pole an unusual “tiger stripe” appearance.

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DTM at AGU 2019

Attending the 2019 AGU Fall Meeting? Find Updates, Resources, and More

The American Geophysical Union (AGU) Fall Meeting will be held December 9-13, 2019, in San Francisco, CA. DTM scientists will be presenting their latest scientific discoveries in areas including seismology, planetary science, geochemistry, and cosmochemistry.

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"News Vacuum" | Letter from the Director | November 2019

Newspapers float around in the vacuum of space.

Director's letter from November 2019 covers Saturn's moons, exoplanets, the Mercury transit, podcasts, and more! 

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Mercury in Transit: The History and Future of Measuring Transits

Mercury transits across the Sun

In astronomical parlance, a transit is a celestial phenomenon in which an object passes between us---the observer---in front of a larger object. A transit of Mercury, in which Mercury passes in front of the Sun, is an example of such phenomena that took place on November 11th, 2019 between 7:35 AM EST until 1:04 PM EST

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Searching for the Deep Roots of Arc Volcanoes, Geoffrey Abers Presents His Tuve Lecture

Mount St Helens Erupting in 1980. Photo credit: USGS

On Thursday, October 31, 2019, Geoffrey Abers, the William and Katherine Snee Professor in Geological Sciences at Cornell Engineering and visiting Merle A. Tuve Senior Fellow at DTM, gave his lecture titled “Searching for the Deep Roots of Arc Volcanoes: Results from iMUSH Seismic Imaging in the Washington Cascades.”

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