Comets TOP STORY

Dust Streams from Comet 67P/Churyumov-Gerasimenko

© MPS/ESA

Comet 67P/Churyumov-Gerasimenko

Rosetta's comet 67P/Churyumov-Gerasimenko is beginning to show a clearly visible increase in activity.


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Mars Reconnaissance Orbiter Image Shows Comet Nucleus is Small

© NASA

comet C/2013 A1 Siding Spring

These images were taken of comet C/2013 A1 Siding Spring by NASA's Mars Reconnaissance Orbiter on Oct. 19, 2014, during the comet's close flyby of Mars and the spacecraft.

Comet Siding Spring Close Encounter with Mars Q & A

Comet Siding Spring Close Encounter with Mars Q & A Video in Story

Jared Espley and Michelle Thaller talk about the close encounter between Mars and Comet Siding Spring at the Oct 17, 2014.


Primary Landing Site Confirmed for Philae

Primary Landing Site Confirmed for Philae Video in Story

ESA has given the green light for its Rosetta mission to deliver its lander, Philae, to the primary site on 67P/Churyumov-Gerasimenko on 12 November, in the first-ever attempt at a soft touchdown on a comet.


Rosetta Mission Selfie 16 km From Comet 67P/C-G

Rosetta Mission Selfie 16 km From Comet 67P/C-G

This latest image was taken by the CIVA imaging system on board Rosetta's lander Philae, on 7 October.


NASA News Briefing on Comet Siding Spring Close Encounter With Mars

NASA News Briefing on Comet Siding Spring Close Encounter With Mars Video in Story

During an October 9 press briefing at NASA headquarters, panelists discussed the Earth and space-based assets that will be in position to observe the October 19 flyby of Mars by comet C/2013 A1, also known as comet Siding Spring. These assets include NASA's iconic Hubble Space Telescope and spacecraft orbiting and roving Mars.


Comet 67P/Churyumov-Gerasimenko Fires Its Jets

Comet 67P/Churyumov-Gerasimenko Fires Its Jets

The four images that make up this montage of comet 67P/Churyumov-Gerasimenko were taken on Sept. 26, 2014 by the European Space Agency's Rosetta spacecraft.


Philae Will Land On Comet 67P/Churyumov-Gerasimenko on 12 November

Philae Will Land On Comet 67P/Churyumov-Gerasimenko on 12 November

The European Space Agency's Rosetta mission will deploy its lander, Philae, to the surface of Comet 67P/Churyumov-Gerasimenko on 12 November.


Landing Site Selected For Rosetta's Lander Philae

Landing Site Selected For Rosetta's Lander Philae Video in Story

Rosetta's lander Philae will target Site J, an intriguing region on Comet 67P/Churyumov-Gerasimenko that offers unique scientific potential, with hints of activity nearby, and minimum risk to the lander compared to the other candidate sites.


Where Will Rosetta's Philae's Lander Land on Comet 67P/Churyumov-Gerasimenko?

Where Will Rosetta's Philae's Lander Land on Comet 67P/Churyumov-Gerasimenko? Video in Story

Comet 67P/Churyumov-Gerasimenko is offering mission managers a variety of scientifically useful targets to chose from for the landing site of the Rosetta's small lander Philae. Which location will they select? The announcement is set for Monday, September 15.


Preliminary Map of Comet 67P/Churyumov-Gerasimenko

Preliminary Map of Comet 67P/Churyumov-Gerasimenko

Scientists working on images of comet 67P/Churyumov-Gerasimenko have divided the comet's surface into a number of different regions based on their morphology, revealing a unique, multifaceted world.


Rosetta Landing Site Search Narrows

Rosetta Landing Site Search Narrows

Using detailed information collected by ESA's Rosetta spacecraft during its first two weeks at Comet 67P/Churyumov-Gerasimenko, five locations have been identified as candidate sites to set down the Philae lander in November - the first time a landing on a comet has ever been attempted.


Comet 67P/Churyumov-Gerasimenko From 69 KM

Comet 67P/Churyumov-Gerasimenko From 69 KM

Full-frame NAVCAM image taken on 21 August 2014 from a distance of about 69 km from comet 67P/Churyumov-Gerasimenko.


Comet 67P/Churyumov-Gerasimenko on 18 August 2014

Comet 67P/Churyumov-Gerasimenko on 18 August 2014

Rosetta navigation camera image taken on 18 August 2014 at about 84 km from comet 67P/Churyumov-Gerasimenko. The comet nucleus is about 4 km across.


NASA's 3-D Study of Comets Reveals Chemical Factory at Work

NASA's 3-D Study of Comets Reveals Chemical Factory at Work Video in Story

A NASA-led team of scientists has created detailed 3-D maps of the atmospheres surrounding comets, identifying several gases and mapping their spread at the highest resolution ever achieved.


ScienceCasts: Mars vs Comet Siding Spring

ScienceCasts: Mars vs Comet Siding Spring Video in Story

Comet Siding Spring is about to fly historically close to Mars. The encounter could spark Martian auroras, a meteor shower, and other unpredictable effects. Whatever happens, NASA's fleet of Mars satellites will have a ringside seat.


Rosetta Arrival at Comet 67P/Churyumov-Gerasimenko Highlights

Rosetta Arrival at Comet 67P/Churyumov-Gerasimenko Highlights Video in Story

Highlights from ESA's mission control centre during Rosetta's arrival at comet 67P/C-G on 6 August 2014. Includes live updates from the Rosetta flight control team, confirmation of orbit entry and presentation of latest images and science results. Also includes background videos.


What is a Comet?

What is a Comet? Video in Story

The Rosetta Mission Asks: What is a Comet? Scientists attempt to answer these questions and more as the Rosetta Mission's Orbiter arrives and escorts comet 67/p Churyumov Gerasimenko into our inner solar system.



More top stories from October.