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Did small galaxies come together to make big galaxies?
Astronomers believe that it's from humble "building blocks" that mighty galaxies like our own Milky Way grew into giants.
September 16, 2009
Copper, where does it come from?
Astronomers use computers to study stars in the Milky Way and in a star cluster called Omega Centauri to learn more about the origin of copper.
September 16, 2009
Black hole, compact, dense, how do they form?
Cygnus X-1, an x-ray source, was one of the first black hole candidates to be discovered. It is thought to contain a black hole orbited by a bright, young star.
September 15, 2009
Can I see our galaxy from Earth?
On a very dark clear night - and if you look in the right direction - you can see a bright region of our own Milky Way galaxy.
September 15, 2009
How can some fish change from female to male?
Parrotfish an anemonefish can live for a while as male fish or female - but different hormones kick in and cause it to change.
September 15, 2009
Is red Antares bigger than our sun?
The ancients saw red Antares as the ruby Heart of the Scorpion in the constellation Scorpius. This star has since ballooned in size.
September 15, 2009
Ted Bergin: ‘Space clouds contain water enough to fill oceans’
Ted Bergin says Space clouds, many light-years in size, collapse to form stars and planets. Some may contain the building blocks of life.
September 14, 2009
Mylea Bayless studies bats, speaks of bat decline
Mylea Bayless said bats might face extinction due to a fungus called 'white nose syndrome.'
September 14, 2009
Harry Gray: Solar fuel cells will create fuel from sunlight
Just as plants use sunlight to make their own energy, Harry Gray says his solar fuel cells could one day create enough fuel from the sun to provide the energy humanity needs.
September 14, 2009
Drew Endy: Synthetic biology for new genetic material
Drew Endy points to the development of an antimalarial drug as a successful product of synthetic biology. And talks about future goals of synthetic biology.
September 14, 2009
