Special Issue | 23 January 2015Catching a comet

Science's special section contains the first published scientific results from Rosetta at comet 67P.

Read the full introduction

Image portrays the Earth, the Moon and Comet 67P/Churyumov-Gerasimenko showing how they would appear in the same light conditions, taking in account their relative albedos, the percentage of light reflected by the body. The Earth reflects 31% of the light, the Moon 12% and Comet 67P about 6%. The images are not to scale physically.

Credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA & Gordan Ugarkovich (Earth); Robert Vanderbei, Princeton Univ (Moon); ESA/Rosetta/NAVCAM (67P/C-G)

From Science


Rosetta begins its comet tale

Research Article

On the nucleus structure and activity of comet 67P/Churyumov-Gerasimenko

A comet with an unusual shape has an array of surface features and high porosity, with early outgassing between its two lobes.
Research Article

The morphological diversity of comet 67P/Churyumov-Gerasimenko

Images with better than 1-meter-per-pixel resolution shows a comet’s morphology with evidence for complex active processes.
Research Article

Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun

Observations of the dust outflow show bound and unbound grains and imply a comparatively high dust-to-gas ratio of 4.
Latest News

Close-ups of comet Churyumov-Gerasimenko/67P reveal an actively sculpted surface

Diversity of features points to a more complicated cometary birth.

Highlights from previous news coverage:


67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio

In situ mass spectrometry reveals a deuterium-to-hydrogen ratio three times that of Earth, which is suggestive of diverse origins for comets in this class.

The organic-rich surface of comet 67P/Churyumov-Gerasimenko as seen by VIRTIS/Rosetta

The reflectance behavior of an illuminated comet is consistent with the presence of nonvolatile organics and sparse water ice.

Time variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko

Mass spectrometry performed in situ shows a highly heterogeneous coma with large diurnal and possibly seasonal variations.

Birth of a comet magnetosphere: A spring of water ions

The interaction of the solar wind and a comet atmosphere is characterized through detection of the energetic ion environment.

Subsurface properties and early activity of comet 67P/Churyumov-Gerasimenko

Measurements at a comet yield water production rates and an assessment of low thermal inertia.

Image Galleries

Comet 67P in all its glory



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