nucleus
Interstellar Comet 2I/Borisov Appears to Have Broken in Half
In 2019, amateur astronomer Gennadiy Borisov discovered a comet, which now bears his name. There's a long history of amateur…
Video of Green Comet 45P Puts You Close To The Action
Watch Comet 45P pirouette end over end in this detailed radar view of the comet's nucleus.
What is Binding Energy?
When it comes to everything from stellar objects to atoms and chemical compounds, binding energy is the measure of what…
Latest Research Reveals a Bizarre and Vibrant Rosetta’s Comet
We've subsisted for months on morsels of information coming from ESA's mission to Comet 67P/Churyumov-Gerasimenko. Now, a series of scientific papers in…
How to Find and Make the Most of Comet Lovejoy
Comet Q2 Lovejoy passed closest to Earth on January 7th and has been putting on a great show this past week.…
Neck Of Rosetta’s ‘Rubby Duckie’ Comet Shows A Bright Ring
Rosetta's "rubber duckie" comet appears to be wearing a collar! New images of Comet 67P/Churyumov-Gerasimenko from the spacecraft, which is…
Rosetta Watches Comet 67P Tumbling Through Space
This is really getting exciting! ESA's Rosetta spacecraft (and the piggybacked Philae lander) are in the home stretch to arrive at Comet…
Comet ISON Grows Wings; Comet Lovejoy, a Fountain
Wonderful photos of Comets ISON and Lovejoy with their swollen comas and developing tails have appeared on these pages, but…
Keeping up with Comet PANSTARRS through the end of March
Wow - what an image! Michael Jaeger's photo of Comet C/2011 L4 PANSTARRS on March 19 resembles those taken by…