1. By: Carli Cosenza 1 st Hour

2. -Regulus is also known as Alpha Leonis. -Not counting the Sun, it is the 21 st brightest star in the sky, as seen from it’s apparent brightness from Earth. -Regulus is a multiple star system- it is orbited by a distant binary pair of stars.

3. REGULUS:THE SUN:  The Diameter may be over 3.14 times that of the Sun.  This would make the diameter around 2,715,905 miles!  1,391,980 kilometers, or 864,938 miles, in diameter. As you can see, Regulus is a lot bigger!

4. REGULUSTHE SUN  The temperature at its poles is 15,00 degrees Celsius, whereas at the equator, the temperature is 10,000 degrees Celsius.  This temperature is a lot hotter than the Sun, which is one of the reasons why it is the 21 st brightest star in the sky.  10,000 degrees Fahrenheit, or 6,000 degrees Celsius.

5. REGULUS SUN:  Regulus is a blue-white- colored star.  The Sun is yellowish- orange colored. Regulus is very different than the Sun. The Sun doesn’t look like Regulus at all.

6.  Regulus is 77 light years away from the Sun, making it the closest star to the Sun.  Although it sounds really far away, this is a remarkably close distance in space!

7. Regulus

8.  Regulus is located in the constellation Leo. As its story goes, Heracles, a Greek hero, wanted to fight off Nemean Lion, a huge and dangerous beast. The beast, however, fought and killed Heracles, gaining power.  This constellation is shaped like Nemean Lion.  Regulus is the heart of the Lion in this constellation. In ancient cultures, Regulus, the brightest star in Leo, has been associated with the concept of royalty and kingly power.  It has been said that Regulus focuses the energy of Sirius, the brightest star in the sky, towards the Earth. Regulus acts as a “regulator” for the energies of Sirius.

10.  Regulus was born because of a nebula, or a giant cloud of gas and dust.  It will live its life as a blue supergiant, or even a blue- white supergiant, because of its hot temperature and giant mass.  Near the end, it will cool down to a Red Supergiant.  Regulus will then die in either a giant explosion, called a supernova, or a black hole, which means that it becomes so dense that that nothing can escape its gravitational pull, and it turns completely black.  Currently, Regulus is 150 million years old, which is pretty old for such a big mass, probably near the middle-end part of its life, and Regulus is still a blue- white supergiant.

11.  http://www.solstation.com/stars2/regulus3.htm http://www.solstation.com/stars2/regulus3.htm  http://www.daviddarling.info/encyclopedia/R/Regulus.html http://www.daviddarling.info/encyclopedia/R/Regulus.html  http://www.innovations- report.com/html/reports/physics_astronomy/report-39041.html http://www.innovations- report.com/html/reports/physics_astronomy/report-39041.html  http://en.wikipedia.org/wiki/Regulus http://en.wikipedia.org/wiki/Regulus  http://www.universetoday.com/2005/01/21/egg-shaped-regulus- is-spinning-fast/ http://www.universetoday.com/2005/01/21/egg-shaped-regulus- is-spinning-fast/  http://www.slackerastronomy.org/wordpress/2008/06/regulus- just-when-you-think-you-know-a-star/ http://www.slackerastronomy.org/wordpress/2008/06/regulus- just-when-you-think-you-know-a-star/

12. Hope you enjoyed the PowerPoint and learned a lot!