Stars

A dense, glowing ball of hydrogen, helium, and trace quantities of heavier elements that shines with energy released from a hydrogen thermonuclear fusion reaction in the center, or core. Our Sun is an example of a star. Stars can appear red, orange, yellow, blue, or white, according to their masses and effective temperatures. Stars are born from clouds of gas and dust, live for millions or billions of years, depending on their masses, and die sometimes spectacular deaths. Stars usually exist in very large collections called galaxies.

Resources

Cosmic Beacons The stars that 'twinkle, twinkle' in the night...

Radio Programs

Runaway Stars Stars that are leaving home in a hurry Friday, April 11, 2014
Zeta Cas A star that's far above average Sunday, February 23, 2014
Moon and Aldebaran Taking the measure of the bull’s eye Friday, February 7, 2014
Life of Procyon The life of the Little Dog Star Saturday, December 28, 2013
More Aquarius A pair of yellow supergiants Sunday, December 8, 2013
Fomalhaut Surprises from a well-studied star Monday, October 14, 2013
Equuleus Two stars whose fates are intertwined Saturday, August 24, 2013
Counting Stars Counting the stars in the Milky Way Friday, July 26, 2013
Moon and Aldebaran The beginning of the end Thursday, July 4, 2013
Solar Twins A star that looks familiar Saturday, June 1, 2013
Twinkling Jewels Up-and-down stars in the northern crown Thursday, May 30, 2013
Messy Giant Kicking up dust around a giant star Friday, April 12, 2013
Gamma-2 Velorum A star exposes its inner workings Friday, April 5, 2013
Groombridge 1830 An interloper from a distant realm Sunday, March 31, 2013
Ringing Beat The beat of vibrating stars Wednesday, March 6, 2013
Moon and Antares A hot-but-cool stellar supergiant Monday, February 4, 2013
Superflares Super explosions on other stars Wednesday, January 23, 2013
Epsilon Geminorum A star by the numbers Thursday, January 17, 2013
Pollux Younger but “older” than the Sun Wednesday, January 16, 2013
Moon and Spica Giant tides on giant stars Friday, January 4, 2013
Star Populations Segregating the stars of the Milky Way Monday, December 3, 2012
Halloween Star A two-headed stellar demon Tuesday, October 30, 2012
Aries II Taking the measure of a nearby star Sunday, October 28, 2012
Alpha and Beta Aquarii Rare supergiant stars Tuesday, October 23, 2012
Arcturus Tracing a star’s origins Tuesday, August 28, 2012
M11 A flock of young stars Thursday, August 9, 2012
Spinning Hearts The spinning hearts of giant stars Thursday, August 2, 2012
Equuleus Drawing up a little horse Sunday, July 29, 2012
Moon and Scorpius Scoping out a solar twin Friday, July 27, 2012
H-R Diagram Drawing the lives of the stars Saturday, July 7, 2012
Faint But Steady Stars that are faint but long-lived Thursday, July 5, 2012
The Keystone Four stars, four stories Friday, May 25, 2012
Moon, Mars, and Regulus Different pinpoints of light Monday, April 2, 2012
Moon and Regulus Lining up a pair of stellar light bulbs Thursday, March 17, 2011
Alkaid The "leading" star of the Big Dipper Tuesday, February 22, 2011
Moon and Regulus Pinning down a moving star Thursday, February 17, 2011
Messengers The messengers of the stars Wednesday, February 2, 2011
Stellar Shock Wave A star rams its way through the galaxy Wednesday, January 5, 2011
Moon and Aldebaran Keeping an eye on a giant star Sunday, November 21, 2010
More Moon and Aldebaran Putting a star on the bathroom scale Tuesday, October 26, 2010
Alderamin Rounding up a regal star Saturday, October 23, 2010
Stellar Heavyweight Bulked-up stars in a nearby galaxy Sunday, October 17, 2010
Rasalhague A star with a bulging waistline Saturday, May 29, 2010
Beta Bootis A giant star flares up Friday, May 28, 2010
Moon and Spica The long beginning of a long journey Monday, May 24, 2010
Cepheus Nursery Giving birth to new stars Friday, May 14, 2010
Alkaid Getting a handle on the Big Dipper Sunday, May 9, 2010
Moon and Spica Following the rhythms of the night Tuesday, March 30, 2010
The Crane A crane strides across the southern horizon Friday, December 4, 2009
Tarantula Nebula Stellar "eggs" from a tarantula Monday, May 25, 2009
Stellar Census Counting up the neighbors Monday, March 30, 2009
Vindemiatrix A star with an intoxicating name Tuesday, March 17, 2009

Featured Images

A rare yellow hypergiant star in Centaurus
Jolly Yellow Giant Thursday, March 13, 2014
A discharge of energy from the Z Machine at Sandia National Laboratories
Zapped! Monday, February 3, 2014
The star Gamma Cas blows away gas from a nearby nebula
Star Blaster Sunday, August 18, 2013
View of the 30 Doradus star cluster and the massive binary system R144
Megastars Tuesday, July 9, 2013
Artist's concept of the Sun's structure
Powerhouse Monday, December 17, 2012
H-R Diagram
Stellar Plot Saturday, July 7, 2012
Rings and bubbles from a dying star
Jumping Through Hoops Thursday, August 5, 2010
Youthful Oldies Thursday, March 4, 2010
Lining Up Future Discoveries Monday, December 14, 2009

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