A pulsar is a rapidly spinning neutron star which is the small, incredibly dense remnant of much more massive star. How dense? A teaspoon of matter from a neutron star weighs as much as Mount Everest.
Our friend Shreenivasan Manievannan posted this photo to EarthSky Facebook. He wrote that, from this beach in southern California, even with all the light pollution from nearby Los Angeles, the Milky Way rose and was visible to the unaided eye. Thank you, Shreenivasan!
Yesterday, on March 26, we featured the Winter Circle, that great big lasso of brilliant stars that even dwarfs the constellation Orion the Giant Hunter. Orion makes up the southwestern part of the Winter Circle, whereas the Winter Triangle fills up the southeastern part of the humongous Winter Circle.
Metoposaurus algarvensis, aka toilet jaws, was all over our early ancestors. The thing that got us off the hook? A big hot interception 200 million years ago.
The goal of the mission is to find out how the human body responds to a prolonged stay in space. Watch the launch and watch the arrival.
On Tuesday, NASA’s Opportunity Mars Rover completed the first Red Planet marathon – 26.2 miles (42.195 kilometers) – with a finish time of 11 years and 2 months.
Day of the eclipse, photo taken from cockpit at cruise level at 35,000 feet out of Bristol.
Looks like a shoot taken from much higher at space height!
Tonight’s wide waxing crescent moon resides inside the Winter Circle – an incredibly large star configuration made of six brilliant stars – as seen from North America. We’ll see the Winter Circle fill up much of the south to southwest sky at dusk/nightfall. Elsewhere in the world, the moon will also be in the midst of these stars, or at least near them.
Have you heard of the Svalbard Global Seed Vault – sometimes called the Doomsday Vault – a seed bank on the Norwegian island of Spitsbergen, only 810 miles (about 1,300 kilometers) from the North Pole? Cary Fowler spearheaded its groundbreaking in 2006, and he remains the seed bank’s prime mover. Now a new film – due to open on May 22 – tracks the passion for saving a global diversity of seeds that has occupied Fowler for three decades.
Abhijit Juvekar posted this photo to EarthSky Facebook yesterday (March 24, 2015), in an illustration of the fact that – at this time of year, as seen from across the globe – the sunsets are moving a little farther northward each evening.