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…

2 years ago

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.

6 years ago

What is Binding Energy?

When it comes to everything from stellar objects to atoms and chemical compounds, binding energy is the measure of what…

6 years ago

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…

8 years ago

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.…

8 years ago

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…

8 years ago

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…

8 years ago

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…

9 years ago

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…

10 years ago