What’s Up! April 2021

A monthly look at astronomical events in the sky and on Earth 

Compiled by John Rowland

Please see the “Leave a Reply” appeal at the end of the article – Editor.


Wow! All of a sudden it’s light in the early evening, with the Sun not setting until 7:40 pm on the 1st of the month. Summer skies and reduced viewing opportunities are ahead, so make the most of what darkness remains before you have to wait until after 10 pm for nautical twilight to end – which is when it ends on the 30th.

And the situation is exacerbated by the fact that all six planets – that are normally observable when skies are not particularly dark – are too distant (e.g. Mars) or impossible to see because they are too near the Sun, or only visible briefly at around 6 a.m. and very close to the horizon. Continue reading