Comets TOP STORY

Comet 67P/Churyumov-Gerasimenko From 69 KM

© ESA/Rosetta/NAVCAM

Comet 67P/Churyumov-Gerasimenko

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


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Comet 67P/Churyumov-Gerasimenko on 18 August 2014

© ESA/Rosetta/NAVCAM

Comet on 18 August 2014 - NavCam

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.


ESA Releases Stunning New Images of Comet 67P/Churyumov-Gerasimenko

ESA Releases Stunning New Images of Comet 67P/Churyumov-Gerasimenko

Comet 67P/Churyumov-Gerasimenko by Rosetta's OSIRIS narrow-angle camera on 3 August from a distance of 285 km. The image resolution is 5.3 metres/pixel.


Comet Siding Spring's October Encounter with Mars Will Create 30 Minutes of Concern for Global Space Agencies

Comet Siding Spring's October Encounter with Mars Will Create 30 Minutes of Concern for Global Space Agencies

On October 19, 2014, at 18:32 UTC, Comet Siding Spring (2013A1) will pass Mars at roughly 150,000 kilometers, about 1/3 the distance between Earth and the Moon, in a direction putting it on a track for its dust to pass over the Martian North Pole, possibly endangering, over a thirty minute window, the collection of orbital spacecraft currently on station in that region.


Imaging Rosetta's Comet

Imaging Rosetta's Comet

A distinct coma surrounds comet 67P/Churyumov-Gerasimenko as seen from Rosetta.


Comet 67P/Churyumov-Gerasimenko Revealed

Comet 67P/Churyumov-Gerasimenko Revealed

This week's images of comet 67P/Churyumov-Gerasimenko reveal an extraordinarily irregular shape. We had hints of that in last week's images and in the unscheduled previews that were seen a few days ago, and in that short time it has become clear that this is no ordinary comet.


How Big is Rosetta Spacecraft Compared with Comet 7P/Churyumov--Gerasimenko?

How Big is Rosetta Spacecraft Compared with Comet 7P/Churyumov--Gerasimenko? Video in Story

This short animation explains the relative sizes of the Rosetta spacecraft and comet 67P/Churyumov--Gerasimenko.


Rosetta's Comet 'Sweats' Two Glasses of Water a Second

Rosetta's Comet 'Sweats' Two Glasses of Water a Second

ESA's Rosetta spacecraft has found that comet 67P/Churyumov-Gerasimenko is releasing the equivalent of two small glasses of water into space every second, even at a cold 583 million kilometers from the Sun.


Rosetta Target Comet 67P/Churyumov-Gerasimenko Quiets Down

Rosetta Target Comet 67P/Churyumov-Gerasimenko Quiets Down

An image snapped earlier this month by ESA's Rosetta spacecraft shows its target comet has quietened, demonstrating the unpredictable nature of these enigmatic objects.


NASA Rosetta Instruments Begin Science Operations

NASA Rosetta Instruments Begin Science Operations

Three NASA science instruments aboard the European Space Agency's (ESA) Rosetta spacecraft, which is set to become the first to orbit a comet and land a probe on its nucleus, are beginning observations and sending science data back to Earth.


Carmelopardalis Meteor Shower Could be Spectacular

Carmelopardalis Meteor Shower Could be Spectacular Video in Story

A comet discovered in 2004 will make a close approach this Friday resulting in what could be a spectacular meteor shower and possibly, though not likely, a meteor storm.


Rosetta Starts Braking in Approach to Comet 67P/Churyumov-Gerasimenko

Rosetta Starts Braking in Approach to Comet 67P/Churyumov-Gerasimenko Video in Story

Rosetta is about to put on the brakes to ensure that it is on target for comet 67P/Churyumov-Gerasimenko.


Rosetta: When Can We See The Comet?

Rosetta: When Can We See The Comet? Video in Story

Visualisation of how comet 67P/Churyumov-Gerasimenko will appear in Rosetta's OSIRIS narrow angle camera between May and August 2014. During this time, the 4 kilometre-wide comet will 'grow' in Rosetta's field of view from appearing to have a diameter of less than 1 camera pixel to well over 2000 pixels -- equivalent to a resolution of around 2 metres per pixel -- allowing the large surface features to be resolved.


Rosetta Sees Comet 67P/Churyumov-Gerasimenko

Rosetta Sees Comet 67P/Churyumov-Gerasimenko

ESA's Rosetta spacecraft has caught a first glimpse of its destination comet since waking up from deep-space hibernation on 20 January.



More top stories from August.