BBC Sky at Night

Welcome

hen Galileo recorded his magnified observations of the Moon and the planets with a modified new Dutch invention, the telescope, he could hardly have foreseen the revolution in understanding he had set to read Ezzy Pearson’s celebration of the instruments that have perhaps done most to widen the boundaries of our understanding.

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BBC Sky at Night5 min read
Sky-Watcher EQ-AL55i Pro Wi-Fi mount
∙ Price £779 ∙ Mount type Equatorial with Go-To ∙ Load capacity 10kg ∙ Slew speed Up to 4° per second ∙ Power input 12V DC ∙ Autoguider port ST4 ∙ Protocols SynScan, ASCOM via Wi-Fi or USB ∙ Weight 14.8kg ∙ Supplier Optical Vision Ltd ∙ Email info@op
BBC Sky at Night3 min read
The Planets
PICK OF THE MONTH Best time to see: 30 June, 03:50 BST (02:50 UT) Altitude: 15° Location: Aries Direction: East Features: Surface markings, weather Recommended equipment: 150mm scope or larger Mars is a mag. +1.0 morning object at the start of June,
BBC Sky at Night1 min read
Travel Restrictions
You would expect that extremely energetic particles are hard to stop, but no. If a high-energy proton or electron collides with an atomic nucleus in Earth's atmosphere (or in interstellar space), the collision energy is converted into a whole load of

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