Comets TOP STORY

The Relationships Between Chemicals on Comets

© NASA/ESA/STSCI

Comet 73P/Schwassmann-Wachmann 3

A new study has revealed similarities and relationships between certain types of chemicals found on 30 different comets, which vary widely in their overall composition compared to one another.


Full Story

Comets TOP STORIES

Rosetta Ends Its Mission By Slowly Crash Landing On A Comet

© ESA

Rosetta Landing

ESA's historic Rosetta mission has concluded as planned, with the controlled impact onto the comet it had been investigating for more than two years

Video: Rosetta Mission Comes to an End and Science Highlights

Video: Rosetta Mission Comes to an End and Science Highlights Video in Story

The Rosetta mission came to an end today with the orbiter purposefully "crash" landing (softly) on the Comet 67P/Churyumov-Gerasimenko just as the Philae lander had done previously.


Astronomers Capture Best View Ever of Disintegrating Comet

Astronomers Capture Best View Ever of Disintegrating Comet

Astronomers have captured the sharpest, most detailed observations of a comet breaking apart 67 million miles from Earth, using NASA's Hubble Space Telescope.


Rosetta's Comet Offered Brief and Powerful Summer Fireworks

Rosetta's Comet Offered Brief and Powerful Summer Fireworks Video in Story

Brief but powerful outbursts seen from Comet 67P/Churyumov-Gerasimenko during its most active period last year have been traced back to their origins on the surface.


Rosetta's Descent Towards Active Pits on Comet 67P

Rosetta's Descent Towards Active Pits on Comet 67P

Squeezing out unique scientific observations until the very end, Rosetta's thrilling mission will culminate with a descent on 30 September towards a region of active pits on the comet's 'head'.


Philae Lander Found on Comet 67P

Philae Lander Found on Comet 67P

Less than a month before the end of the mission, Rosetta's high-resolution camera has revealed the Philae lander wedged into a dark crack on Comet 67P/Churyumov-Gerasimenko.


Rosetta Captures Comet Outburst

Rosetta Captures Comet Outburst

In unprecedented observations made earlier this year, Rosetta unexpectedly captured a dramatic comet outburst that may have been triggered by a landslide.


How Comets Are Born

How Comets Are Born

Understanding how and when objects like Comet 67P/Churyumov-Gerasimenko took shape is of utmost importance in determining how exactly they can be used to interpret the formation and early evolution of our Solar System.


Cliffs on Comet 67P/Churyumov-Gerasimenko

Cliffs on Comet 67P/Churyumov-Gerasimenko

This striking view of Comet 67P/ChuryumovGerasimenko reveals portions of both comet lobes, with dramatic shadows on the 'neck' region between them.


Plans To Crash Land Rosetta On Comet 67P Proceed

Plans To Crash Land Rosetta On Comet 67P Proceed

Rosetta is set to complete its mission in a controlled descent to the surface of its comet on 30 September.


Hubble Gets Close Look at Comet 252P/LINEAR

Hubble Gets Close Look at 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.


X-Ray Views Of Comets

X-Ray Views Of Comets

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.



More top stories from December.