BBC Sky at Night

DEEP-SKY TOUR

1 M101

We start with M101, a mag. +7.9 face-on spiral galaxy also known as the Pinwheel. It’s easy to find, marking the northeast point of an equilateral triangle with Mizar (Zeta (ζ) Ursae Majoris) and Alkaid (Eta (η) Ursae Majoris). M101 appears large, 20 × 15 arcminutes through a 150mm scope, which gives it a low surface brightness, but it remains relatively easy to see. A small scope shows a mottled object with uneven

You’re reading a preview, subscribe to read more.

More from BBC Sky at Night

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 Night1 min read
Dark Stars Could Leave Scars Across The Cosmos
The scars left behind by exploding ‘dark stars’ could allow astronomers to examine the invisible Universe, a new study has found. Dark matter is the invisible substance believed to suffuse the entire Universe – though as we can only detect it through
BBC Sky at Night1 min read
The Biggest 3D Map Of The Universe Is Taking Shape
The Dark Energy Spectroscopic Instrument (DESI) is on a five-year quest to make the largest-ever 3D map of the Universe. Though only half-way through its mission, astronomers have used its first year of data to begin answering one of astronomy's bigg

Related Books & Audiobooks