BepiColombo is a spacecraft on a roundabout journey to Mercury. It’ll sweep near Earth tonight, using Earth as a gravity slingshot to send it hurtling toward the inner solar system. For most of us, BepiColombo will pass unseen. But people with telescopes might spot it! Charts and more here.

A huge asteroid – (52768) 1998 OR2 – will pass closest to Earth on April 29. Astronomers at Arecibo Observatory in Puerto Rico begin detailed observations today. Charts, tips – plus how to watch online – here.

Jupiter and Pluto stay close together on the sky’s dome throughout 2020. This year may well present the best Jupiter-Pluto alignment for centuries to come, with the first of the year’s 3 Jupiter-Pluto conjunctions to fall on April 5, 2020.

The sun’s counterglow – or gegenschein – is kind of a stargazers’ legend. What is it, and how can you see it? Erwin Matys and Karoline Mrazek of Project Nightflight explain.

Globular clusters are spherical collections of up to perhaps a million stars, orbiting mostly in the star halo of spiral galaxies, containing some of a galaxy’s oldest stars.