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CONTENTS

= on the cover C

FeaturesFeatures

Features

I I

I M AG ES, A N D R

I S TO CK /G E T T Y

I/

G U CC

: M

PAG E

I S

I M AG ES, T H

I S TO CK /G E T T Y

: B L ACK P H O B O S/

I M AG E

COV ER

I ) ,

( S TS C

H U S TA K

, N ASA /ESA /L E A H

I D E.CO M

S CH E D L ER /CCD G U

, J O H A N N ES

, O R B E X

P H OTO

S TO CK

L A MY

I/A

I L E TS K Y

B

I M AG ES, B B C

I S TO CK /G E T T Y

B ER N OTAS/

I S

, RY T

I O

@ T H ES H E D_ P H OTO S T U D

29 Stargazing and spaceflight

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in 2023

The unmissable sights and flights coming up this year

34 Family-friendly astronomy

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Astro activities that everyone, young or old, can do together

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Part One: Redshift – what is it? 40 Cosmology crash course

60 Spaceflight takes off

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in the UK

Ready for launch! We look at the booming UK space industry

66 From city lights to deep space

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Take our tour of winter sights tailored to urban observers

Regulars 6 Eye on the sky 10 Bulletin 16 Cutting edge 18 Inside The Sky at Night 20 Interactive 23 What’s on 25 Field of view 26 Subscribe to BBC Sky

C

at Night Magazine 72 Explainer 74 DIY astronomy 98 Q&A: an exoplanet observer

Astrophotography 76 Capture 78 Processing 80 Gallery

Reviews 86 Vaonis Vespera Observation

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Station 90 Sky-Watcher Quattro 150P f/4

astrograph 94 Books 96 Gear

16-PAGE CENTRE PULLOUT

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The Sky Guide 44 Highlights 46 The big three 48 The planets 50 January’s all-sky chart 52 Moonwatch 53 Comets and asteroids 53 Star of the month 54 Binocular tour 55 The Sky Guide challenge 56 Deep-sky tour 58 January at a glance

4 BBC Sky at Night Magazine January 2023