Comets TOP STORY
Recently, astronomers announced the results of a study using data collected with NASA's Chandra X-ray Observatory of two comets -- C/2012 S1 (also known as "Comet ISON") and C/2011 S4 ("Comet PanSTARRS").
Comets TOP STORIES
Rosetta's comet has been seen changing color and brightness in front of the ESA orbiter's eyes, as the Sun's heat strips away the older surface to reveal fresher material.
Comet Pan-STARRS made a close flyby of the Earth at a distance of 3.6 million kilometers (2.2 million miles) on March 22.
Silent since its last call to mothership Rosetta seven months ago, the Philae lander is facing conditions on Comet 67P/ChuryumovGerasimenko from which it is unlikely to recover.
This beautiful landscape feels within arm's reach in this stunning view across the Imhotep region on Comet 67P/ChuryumovGerasimenko.
Observations made shortly after Rosetta's arrival at its target comet in 2014 have provided definitive confirmation of the presence of water ice.
One year since Philae made its historic landing on a comet, mission teams remain hopeful for renewed contact with the lander
ESA's Rosetta spacecraft has made the first in situ detection of oxygen molecules outgassing from a comet, a surprising observation that suggests they were incorporated into the comet during its formation.
We can't see the wind, but we can learn about it by observing things that are being blown about.
Since its arrival at comet 67P/Churyumov-Gerasimenko, the European Space Agencys Rosetta spacecraft has been surveying the surface and the environment of this curiously shaped body.
Scientists from the ESA's Rosetta mission are honoring their deceased colleague, Claudia Alexander of NASA's Jet Propulsion Laboratory by naming a feature after her on the mission's target, comet 67P/Churyumov-Gerasimenko.
ESA's Rosetta spacecraft has provided evidence for a daily water-ice cycle on and near the surface of comets.
On Sept. 13, 2015, the Solar and Heliospheric Observatory -- a joint project of the European Space Agency and NASA -- discovered its 3,000th comet, cementing its standing as the greatest comet finder of all time.
On 30 July, the first papers covering the scientific results obtained by Philae on the surface of Comet 67P/Churyumov-Gerasimenko were published in Science magazine.
On 13 August, Comet 67P/Churyumov-Gerasimenko reaches its closest point to the Sun (perihelion) and the Rosetta orbiter will be there to see exactly what happens.
The Rosetta orbiter is continuing its science until the end of the extended Rosetta mission in September 2016. The lander's future is less certain. This film covers some of what we've learnt from Philae about comet 67P/Churyumov-Gerasimenko so far.
Mosaic of six OSIRIS narrow-angle camera images of the geologically diverse Imhotep region on Comet 67P/ChuryumovGerasimenko.
Rosetta's investigations of its comet are continuing as the mission teams count down the last month to perihelion the closest point to the Sun along the comet's orbit when the comet's activity is expected to be at its highest.