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Posts by
Deborah Byrd
Mercury and more before dawn
Ken Christison caught Mercury in the east before dawn this week. He couldn't see it with the eye that day, but you might see it, if you look. Here's how.
July 2, 2015
Are those sinkholes on Rosetta’s comet?
Sinkholes on Earth happen when a subsurface cavern collapses. On the comet, the caverns may be created by ices turning to gas, as the comet nears the sun.
July 1, 2015
SpaceX rocket explodes after launch
It was unmanned, and astronauts aboard the International Space Station still have 4 months of supplies. But it's the third failed cargo mission to ISS in 8 months.
June 28, 2015
Is our universe ringing like a crystal glass?
Two physicists say the universe's expansion has sped up, then slowed down, 7 times since time began. They describe this oscillation as the universe "ringing."
June 26, 2015
Exoplanet has a comet-like tail Gliese 436b
A Neptune-sized exoplanet is being trailed by an immense cloud of hydrogen. This discovery might also suggest a method for detecting extrasolar oceans.
June 25, 2015
How close to finding alien life?
The search for life beyond Earth has heated up. Here are some of the ways that scientists have been thinking and talking about it, including a definition of new buzzword: biosignatures.
June 25, 2015
Big Dipper before dawn
In the month of June, the Big Dipper is low in the sky before dawn.
June 25, 2015
Edgewise view into our Milky Way
Our sun orbits the center of the Milky Way galaxy, which is 100 thousand light-years wide and contains 100 billion stars. Looking into the Milky Way ...
June 24, 2015
Geomagnetic storm strikes. Awesome auroras!
Storms on the sun sent giant plasma clouds across space, which interacted with Earth's magnetic field. See photos of this week's fabulous displays of auroras.
June 24, 2015
