Red dwarfs are small cool stars that usually have less than 10 per cent the mass of the Sun with surface temperatures ranging between about 2,500K and 4,000K. Although they are the most common type of star in the Universe they are intrinsically faint and not a single red dwarf is visible to the naked eye from Earth.

Examples include, Proxima Centauri (mag. +11.1) and Barnard's star (mag. +9.5).

The two bright stars are Alpha Centauri (left) and Beta Centauri (right). The faint red star in the centre of the red circle is Proxima Centauri.

Glossary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


Sky Highlights - August 2017

Total Solar Eclipse
Total Solar Eclipse of August 21st

Meteor Shower
Perseids meteor shower peaks on August 12th

The Planets
This Month's Guide

Algol Minima
Algol eclipse dates and times for August

Northern Hemisphere
Evening
West:- Mercury (mag. +0.4) (start of month)
Southwest:- Jupiter (mag. -1.9)
South:- Saturn (mag. +0.3)
East:- Neptune (mag. +7.8)
Midnight
Southwest:- Saturn
Southeast:- Neptune
East:- Uranus (mag. +5.8)
Morning
Southwest:- Neptune
South:- Uranus
East:- Venus (mag. -4.0)

Southern Hemisphere
Evening
West:- Mercury (first half of month)
Northwest:- Jupiter
North:- Saturn
East:- Neptune
Midnight
West:- Jupiter
Northwest:- Saturn
North:- Neptune
East:- Uranus
Morning
West:- Neptune
North:- Uranus
Northeast:- Venus

Deep Sky

Small telescopes:-
Messier 13 - M13 - Great Hercules Globular Cluster
Messier 92 - M92 - Globular Cluster
Messier 11 - M11 - The Wild Duck Cluster (Open Cluster)
Messier 7 - M7 - The Ptolemy Cluster (Open Cluster)
Messier 6 - M6 - The Butterfly Cluster (Open Cluster)
Messier 4 - M4 - Globular Cluster
Messier 8 - M8 - Lagoon Nebula (Emission Nebula)
Messier 16 - M16 - Eagle Nebula (Emission Nebula with Open Cluster)
Messier 20 - M20 - Trifid Nebula (Emission and Reflection Nebula)

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