Comets TOP STORY

Hubble Gets Close Look at Comet 252P/LINEAR

© STSCI

Comet 252P/LINEAR

This sequence of images taken by NASA's Hubble Space Telescope shows Comet 252P/LINEAR as it passed by Earth. The visit was one of the closest encounters between a comet and our planet.


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X-Ray Views Of Comets

© NASA

Comets viewed in X-ray

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").

Rosetta's Comet Is Changing Color

Rosetta's Comet Is Changing Color

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.


Dark Object Observed While Making Close Flyby of Earth

Dark Object Observed While Making Close Flyby of Earth

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.


Philae Comet Lander Faces Eternal Hibernation

Philae Comet Lander Faces Eternal Hibernation Video in Story

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.


Afternoon View On A Comet

Afternoon View On A Comet

This beautiful landscape feels within arm's reach in this stunning view across the Imhotep region on Comet 67P/ChuryumovGerasimenko.


Exposed Ice on Rosetta's Comet Confirmed as Water

Exposed Ice on Rosetta's Comet Confirmed as Water

Observations made shortly after Rosetta's arrival at its target comet in 2014 have provided definitive confirmation of the presence of water ice.


Philae Lander: One Year On A Comet

Philae Lander: One Year On A Comet Video in Story

One year since Philae made its historic landing on a comet, mission teams remain hopeful for renewed contact with the lander


First Detection of Molecular Oxygen At A Comet

First Detection of Molecular Oxygen At A Comet

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.


Comet Encke's Tail May Shed Light on Solar Wind Heating

Comet Encke's Tail May Shed Light on Solar Wind Heating

We can't see the wind, but we can learn about it by observing things that are being blown about.


Rosetta's First Peek at Comet 67P's Dark Side

Rosetta's First Peek at Comet 67P's Dark Side

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.


Comet Feature Named After Late NASA Scientist Claudia Alexander

Comet Feature Named After Late NASA Scientist Claudia Alexander

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.


Rosetta Discovers Water/Ice Cycle on Comet 67P

Rosetta Discovers Water/Ice Cycle on Comet 67P

ESA's Rosetta spacecraft has provided evidence for a daily water-ice cycle on and near the surface of comets.


SOHO Discovers its 3,000th Comet

SOHO Discovers its 3,000th Comet

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.


Philae's Descent on Comet 67P/Churyumov-Gerasimenko: The Director's Cut

Philae's Descent on Comet 67P/Churyumov-Gerasimenko: The Director's Cut Video in Story

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.


ESA: The Organic Comet 67P/Churyumov-Gerasimenko

ESA: The Organic Comet 67P/Churyumov-Gerasimenko Video in Story

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.


ESA Provides an Overview on the Philae Lander Results

ESA Provides an Overview on the Philae Lander Results

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.


Imhotep Mosaic

Imhotep Mosaic

Mosaic of six OSIRIS narrow-angle camera images of the geologically diverse Imhotep region on Comet 67P/ChuryumovGerasimenko.



More top stories from May.