April 2021 Bonus Content

Access this month's Bonus Content

Access this month’s Bonus Content. If you are having trouble with any of the download links, right-click on the link, select ‘Copy Link Address’ and paste the link in a new window in your web browser.

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Virtual Planetarium

Pete Lawrence and Paul Abel guide us through this month’s night-sky highlights


Interview: Imaging exoplanets

Astronomer Beth Biller discusses the new instrument that will allow her to directly photograph planets orbiting distant stars

To see the image Beth discusses in the interview, click here.


Audio preview: Helgoland

Download and listen to an extract from physicist Carlo Rovelli’s new book about Heisenberg’s quantum revolution.

Please note: this clip will become available on 25 March 2021.

Download (mp3)

Extracted from the audiobook edition of Helgoland by Carlo Rovelli, read by David Rintoul, published by Allan Lane (£13.00).


Binocular and deep-sky tours

Download this month’s binocular and deep-sky tour charts. The charts are printed in black on white so they can be viewed under red light at your telescope.

Binocular Tour (PDF)

Deep-Sky Tour (PDF)


Southern Sky Chart

Download our sky chart for observers in the southern hemisphere.

Download (PDF)


Observing forms

Record your observations of Jupiter, Mars, Saturn, Venus and the Sun with our handy printable forms.

If you observe the Sun, remember NEVER to look at it with your naked eye; either project it through your telescope or use a solar filter on your telescope’s front lens.

Jupiter (PDF)

Mars (PDF)

Saturn (PDF)

Venus (PDF)

The Sun (PDF)


Readers’ gallery