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What's the difference between HeLa and HeLa S3 cells?
Part II: The life and careers of Florence Rena Sabin, MD
Ethan Siegel is a theoretical astrophysicist who currently teaches at Lewis & Clark College in Portland, OR. You can learn about him, contact him, or just enjoy the site.
April 8th @ 7PM -- premiere of the short film "Dark Matter", starring me, at Hollywood Theatre in Portland, OR!
September 30, 2009
Category: Dark Matter
Many of you saw the pictures I posted Monday of colliding galaxy clusters. These pictures were spectacular, because they not only show galaxy clusters less than 200 million years after a collision (which is short, cosmically), they also show where...
Posted by Ethan Siegel at 1:02 PM • 26 Comments • 0 TrackBacks
September 29, 2009
Category: Environment
As many of you know, light pollution at night has become a big problem. It's a problem for flora and fauna, which rely on the "day/night" cycle that they've adapted to over billions of years, and it's a problem for...
Posted by Ethan Siegel at 10:22 AM • 6 Comments • 0 TrackBacks
September 28, 2009
Category: Dark Matter
Deep into the darkness peering, long I stood there, wondering, fearing, Doubting, dreaming dreams no mortal ever dared to dream before. -Edgar Allen Poe, The Raven Gazing out into the dark abyss of the night sky, stars, galaxies, and clusters...
Posted by Ethan Siegel at 12:17 PM • 39 Comments • 0 TrackBacks
September 27, 2009
Category: Random Stuff
I've liked the musician Rufus Wainwright for some time, but I didn't realize that he was the son of Loudon Wainwright, whom I've just recently discovered. Loudon's a singer/songwriter who's been around for even longer, and who I like even...
Posted by Ethan Siegel at 2:39 PM • 4 Comments • 0 TrackBacks
September 25, 2009
Category: Astronomy
The Milky Way is a mysterious swath of darkness and light through the night sky. In places where light pollution is low enough to see it, its beauty is unmistakable. Well, the above image is what you might see with...
Posted by Ethan Siegel at 5:03 PM • 9 Comments • 0 TrackBacks
September 24, 2009
Category: Solar System
When I was first learning about the science of the Moon, there were a few basic facts that everyone got right. The Moon has practically no atmosphere, as when sunlight hits the Moon, it very quickly can give individual molecules...
Posted by Ethan Siegel at 11:00 AM • 35 Comments • 0 TrackBacks
September 23, 2009
Category: Dark Matter
Long you live and high you fly Smiles you'll give and tears you'll cry All you touch and all you see Is all your life will ever be. -Pink Floyd In part I of this series, we talked about a...
Posted by Ethan Siegel at 12:31 PM • 16 Comments • 0 TrackBacks
September 22, 2009
Category: Galaxies
Gravitational lensing happens when a cluster of galaxies happens to be directly between us and an even more distant galaxy. The light from these distant galaxies gets warped into arcs and, oftentimes, multiple images. This shot from the new Hubble...
Posted by Ethan Siegel at 12:23 PM • 6 Comments • 0 TrackBacks
September 21, 2009
Category: Dark Matter
There are two ways to slide easily through life; to believe everything or to doubt everything. Both ways save us from thinking. -Alfred Korzybski I've recently received a number of messages from readers of this site expressing doubts about the...
Posted by Ethan Siegel at 11:37 AM • 20 Comments • 0 TrackBacks
September 19, 2009
I've got to say, I get some weird things in my head sometimes. I don't know how many of you know who Vashti Bunyan is, but you may have heard a snippet from one of her songs last year in...
Posted by Ethan Siegel at 12:54 PM • 2 Comments • 0 TrackBacks
oscillator 03.04.2010
casaubon's book 03.04.2010
a blog around the clock 03.04.2010
built on facts 03.04.2010
gene expression 03.05.2010
