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R. Cowen

Image of comet 67P/Churyumov-Gerasimenko from a camera aboard Rosetta spacecraft shortly before the spacecraft’s controlled crash.
Posted inNews

Rosetta Spacecraft Death-Dives into Comet Companion—On Purpose

by R. Cowen 30 September 20164 October 2016

On the way to its demise, the probe intimately viewed a dust-spewing pit and measured close up the gravity field, temperature, and other features of the comet.

Posted inNews

Proposed Planet Nine Elicits Cheers, Yawns, Hunt for Proof

by R. Cowen 4 February 20164 February 2016

Evidence of a large, unseen planet at the solar system's margins prompted a flurry of scientific paper downloads, as well as oodles of skepticism. There's no sighting yet of the purported body.

Posted inNews

New Step Toward Finding Earth 2.0

by R. Cowen 8 January 201629 May 2016

Researchers unveil a way to tease out the wobble of a star caused by unseen planets despite the confounding effects of star spots, which are the sunspots of distant stars.

Posted inNews

World Without Time

by R. Cowen 31 December 201531 December 2015

On New Year's Day 2019, a spacecraft known for its historic flyby of Pluto will take an unprecedented look into the distant past by flying right up to a frozen remnant of the original solar system.

Posted inNews

Exoplanets: First Baby Pictures Unveiled

by R. Cowen 3 December 20158 December 2015

New observations of stars hundreds of light-years from Earth reveal evidence of planets still surrounded by disks of the primordial materials they grow from.

Posted inNews

Jupiter's Europa Helps Earthlings See Sister Moon's Volcano

by R. Cowen 17 November 201517 November 2015

By briefly slipping between Earth and sister Jovian moon Io, Europa fortuitously enabled an Earth-based telescope to observe, with greater detail than ever before, a huge, puzzling volcano on Io.

Posted inNews

The Dwarf Planet That Came in from the Cold—Maybe

by R. Cowen 12 November 201512 November 2015

The presence of ammonia-rich clay on much of the surface of Ceres suggests that this dwarf planet—the largest object in the asteroid belt—may have formed far out in the solar system, then wandered in.

Posted inNews

Pluto: In the Icebox but Maybe Still Cookin'

by R. Cowen 9 November 20159 November 2015

New evidence of ice volcanoes and of middle-aged terrains on Pluto's surface suggests that the dwarf planet has remained geologically active ever since it first formed billions of years ago.

Posted inNews

New Spin on Pluto's Moons

by R. Cowen 9 November 201523 November 2015

Strangely speedy rotation rates of Pluto's tiny orbiting companions show up in a trove of images taken as the New Horizons spacecraft approached the dwarf planet last spring and early summer.

Posted inFeatures

The Art and Science of Hubble's Images

by R. Cowen 27 April 201515 March 2022

How do Hubble images get their vivid colors and subtle shading?

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From AGU Journals

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HOT ARTICLE
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