Tag Archives: activity

Icy surprises at Rosetta’s comet

This article is mirrored from the main ESA Web Portal. Rosetta’s comet approached its most active period last year, the spacecraft spotted carbon dioxide ice – never before seen on a comet – followed by the emergence...

Living with a comet: a MIRO team perspective

Rosetta’s MIRO – the Microwave Instrument for the Rosetta Orbiter – has made nearly two billion science measurements at Comet 67P/C-G, and generated over 1.5 million spectra of gases in the comet’s coma. Principal Investigator Mark Hofstadter...

Living with a comet: A ROSINA team perspective

Rosetta’s ROSINA (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) suite of instruments have made plenty of big headlines over the last two years, with the surprising discovery of molecular oxygen and nitrogen and the ‘flavour’ of...

The changing comet – call for contributions

Do you enjoy poring over images of Comet 67P/Churyumov-Gerasimenko? Have you spotted any changes in its surface features since Rosetta first arrived at the comet in August 2014? We are keen to hear from you! Between NAVCAM...

Rosetta’s comet contains ingredients for life

This story is mirrored from the ESA Web Portal Ingredients regarded as crucial for the origin of life on Earth have been discovered at the comet that ESA’s Rosetta spacecraft has been probing for almost two years....

CometWatch 27 March

Last week, Rosetta embarked on an excursion around 1000 km in the anti-sunward direction to study the wider coma, tail and plasma environment of Comet 67P/Churyumov-Gerasimenko. This week's CometWatch is an image taken on the outward leg...

Comet’s dust trail stretches over 10 million km

Comet 67P/Churyumov-Geraimenko’s dust trail has been observed to stretch at least 10 million kilometres in the latest images taken by professional astronomers working on the ground-based observing campaign. The image mosaic shown here is composed of four...

CometWatch 1 March

This week, CometWatch features an image of Comet 67P/Churyumov-Gerasimenko taken by Rosetta's NAVCAM on 1 March 2016, when the spacecraft was 26.7 km from the comet nucleus. With Rosetta back at close distances from the comet, NAVCAM...

Profiling COSIMA’s dust grain family

Rosetta’s COSIMA instrument – the Cometary Secondary Ion Mass Analyser – has detected tens of thousands of dust grains since arriving at Comet 67P/Churyumov-Gerasimenko. The grains collected from 11 August 2014 – 3 April 2015 across nine...

NAVCAM archive update

796 NAVCAM images were just added to the Archive Image Browser. They cover the period 26 August to 20 October 2015, which includes beautiful post-perihelion images, and the comet from afar during Rosetta's far excursion. The latest images...

Perihelion images in NAVCAM archive

759 NAVCAM images from around perihelion, covering the period 1 July to 25 August 2015, are now available in the Archive Image Browser. Browse them in the folders labelled "Comet Escort 3 MTP018" and "Comet Escort 3 MTP019"...

CometWatch 18-19 December

Today's CometWatch entry is a double feature, showing two NAVCAM images taken about twelve hours apart, on 18 and 19 December 2015, when Rosetta was around one hundred km from the comet nucleus. While, at first sight,...

Three different views of Comet 67P/C-G

In the first week since the OSIRIS team launched their new Image of the Day website, we’ve seen three rather different views of Comet 67P/Churyumov-Gerasimenko. The first image to be released (above left), taken on 10 December,...

Comet jet in 3D

OSIRIS scientists have created a spectacular anaglyph view of a jet seen blasting from the nucleus of Comet 67P/Churyumov-Gerasimenko in August. Rosetta observed increased levels of cometary activity in the weeks around perihelion as the comet made...

CometWatch 30 September – Far, far away

Today's CometWatch entry is an image taken by Rosetta’s NAVCAM on 30 September 2015, about 1488 km from the nucleus of Comet 67P/Churyumov-Gerasimenko. The image was taken a few hours after the spacecraft had reached the farthest...

Comet surface changes before Rosetta’s eyes

In the months leading to the perihelion of Comet 67P/Churyumov-Gerasimenko, Rosetta scientists have been witnessing dramatic and rapid surface changes on the Imhotep region, as reported in a paper to be published in Astronomy & Astrophysics Since...