European astronomers have discovered 50 new planets circling distant suns, including 16 close to Earth's size and one skimming its star's habitable zone.

Sep 12, 2011 - Robert Adler

The Big Bang Theory, Prehistory, 1000 B.C., Copernicus, Galileo, Newton, Einstein, Hubble and Beyond

Jul 18, 2010 - Tel Asiado

Most planets have at least one moon. Now astronomers are discovering moons in orbit around asteroids. Dozens more moons are orbiting deep space objects.

Oct 1, 2010 - Harvey Craft

This remote controlled astronomical science toy for children aged 6+ displays the phases of the moon, and doubles up as a battery-powered night light.

Jul 13, 2008 - Richard Mudhar

How could an ancient people have known of the existence of a star system many centuries before telescopes were invented?

Sep 19, 2011 - Brian Baker

Although the asteroids Ceres and Vesta are thousands of times less massive than Earth, their chaotic interaction makes Earth's orbit unpredictable long-term

Jul 16, 2011 - Robert Adler

Images of recent supernovae have enabled astronomers to identify the precursor stars of these explosions, overturning accepted theories of the evolution of massive stars.

Oct 6, 2009 - Wendy A.M. Prosser

Based on a study of 166 stars within 80 light years of Earth, planet hunters estimate that nearly one star out of four harbours an earth-sized planet.

Oct 28, 2010 - Robert Adler

A definition, example, and sample analysis of a definition paragraph.

Apr 2, 2009 - Daria Przybyla

Based on his observations using a telescope, Galileo Galilei (1564-1642) concluded that Venus orbited the sun, not the earth.

Aug 6, 2009 - Linda N. Riggins

Tycho Brahe was the last great naked eye astronomer and one of the great astronomical observers of all time.

Jul 29, 2008 - Paul A. Heckert

A discovery involving massive amounts of red dwarfs in elliptical galaxies has expanded the cosmos as we know it.

Dec 1, 2010 - Kelly Whitt

There is such a thing as a diamond planet, according to new findings by Australian astronomers. It seems like fantasy, but it is out there in our galaxy.

Aug 25, 2011 - Brenna Coleman

All was well until scientists began to discover some pretty big objects beyond Pluto. The issue has lots of non-scientists in an uproar. What's the problem with Pluto?

Jan 31, 2010 - Harvey Craft

Some of the best Greek astronomers living in antiquity were Plato, Aristotle, Aristarchus, Eratosthenes, Hipparchus, and Ptolemy.

Nov 5, 2010 - Eliot Elwar

With Hubble's recent discovery of a diminutive 4th moon around Pluto, the number of known moons that orbit objects other than planets continues to expand.

Aug 3, 2011 - Walter McLaughlin

Believers in planet Nibiru and/or comet Elenin wait for Earth's end in 2012. Another doomsday prophecy that won't happen? Yes, according to scientists.

Jul 26, 2011 - Jill Stefko

A look at the IAU guidelines used for the controversial reclassification of Pluto as a dwarf planet and explanation of the term 'clearing the neighbourhood'

May 26, 2010 - Michelle Strozykowski

Nowadays, celestial discoveries often result in changing not only scientific data but even vocabulary which denotes astronomical objects.

Jan 2, 2009 - Daria Przybyla

Following the original Locksley Hall, Tennyson's Poem: Locksley Hall Sixty Years After contains many astronomical references.

May 11, 2009 - Paul A. Heckert