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Leo is another companion to Orion in our night sky. You can easily find Leo any time that Orion is visible by looking East of the Great Hunter. Although Leo is not as large as Orion, it's distinctive shape makes it very easy to pick out. If you click on the link for the map of Leo on the right, you will notice that the outline of the lion's head and the triangle formed by the stars in the lion's hindquarters are two very distinctive shapes that make this constellation very easy to spot.
Regulus - the Heart of the Lion
The largest and brightest star in Leo is Regulus. This large blue star shines brightly as the heart of the lion. Although not a giant star, Regulus is still over five times as large as our Sun. A small telescope will show you that Regulus is part of what is called a "binary system". Binary stars are stars that have one or more companions that orbit around the largest star in the group, much like the planets orbit around our Sun.
- Chris Dolan's Leo Page
- Chris Dolan's Leo page has lots of technical information about the stars that make up Leo
- Richard Dibon-Smith's Leo Page
- Richard Dibon-Smith's Leo page has a very good explanation of the mythology behind Gemini as well as an excellent reference to its stars and other interesting celestial companions.
There is an Adobe® Acrobat® file (15k) for Leo. You can view the file online by clicking
here. You can save the file on your computer by right-clicking on the link.
You will need the free Adobe® Acrobat® ReaderTM to view the file.