March 8th is International Women's Day (http://www.internationalwomensday.com/), an effort to mark the economic, political, and social achievement of women. From here at the Chandra blog, we'd like to extend that concept to include scientific achievements as well by highlighting our "Women in the High-Energy Universe" (http://chandra.harvard.edu/blog/taxonomy/term/19) series.
Some of our regular blog readers might be familiar with a project called “From Earth to the Universe,” or FETTU for short. FETTU was originally cast as a project for the International Year of Astronomy in 2009, but also has grown beyond that single designation. In a nutshell, FETTU puts astronomical images in public spaces like parks, metro stations, and art centers – basically any place you might not expect to run into them.
Lately, we’ve been noticing some great new videos that are covering some basic – yet hard-to-understand – concepts in astronomy. Here’s one we recently saw, featured on “Astronomy Picture of the Day,” that we thought was worth noting: http://apod.nasa.gov/apod/ap110222.html
Star Size Comparisons (Click the image to launch the video at YouTube)
This composite image shows a beautiful X-ray and optical view of Cassiopeia A (Cas A), a supernova remnant located in our Galaxy about 11,000 light years away. These are the remains of a massive star that exploded about 330 years ago, as measured in Earth's time frame. X-rays from Chandra are shown in red, green and blue along with optical data from Hubble in gold.
When I was a kid, my class was given ‘word problems’ for an alternative math lesson. You probably know the kind: two different trains traveling at different speeds, which one gets there first, etc. While these were possibly a little out of the norm, they didn’t quite excite the inner astronomer in me. Now, the folks at "Space Math @ NASA" have put together a comprehensive set of math activities for astrophiles of any age (or at least grades 3 and up).
Just in time for Valentine's Day comes a new image of a ring -- not of jewels -- but of black holes. This composite image of Arp 147, a pair of interacting galaxies located about 430 million light years from Earth, shows X-rays from the NASA's Chandra X-ray Observatory (pink) and optical data from the Hubble Space Telescope (red, green, blue) produced by the Space Telescope Science Institute (STScI) in Baltimore, Md.
Arp 147 contains the remnant of a spiral galaxy (right) that collided with the elliptical galaxy on the left. This collision has produced an expanding wave of star formation that shows up as a blue ring containing in abundance of massive young stars. These stars race through their evolution in a few million years or less and explode as supernovas, leaving behind neutron stars and black holes.
Every so often, our talented team gets to play with other colors in the crayon box -- that is, wavelengths outside the regime that Chandra observes. We do this for a number of reasons, not the least of which is that something great usually happens.
Today marks the 25th anniversary of the loss of the Challenger Space Shuttle. For many of us, it was an unforgettable moment when we heard the news. It might have been the first time that many of us of a certain generation realized that flying into space wasn’t easy, nor was it always safe.
Space Shuttle Columbia rockets into the night sky on mission STS-93
Melissa Weiss has been a graphic designer for the Chandra project for over a decade. Her work can be seen throughout Chandra's website as well as its print and multimedia products for students, teachers and the public.
I have to be honest, my career in astronomy happened organically. Part of me wants to say that, as a child, I always looked up at the stars and dreamed of what lay with them. But the reality is that my interests weren't really up with the stars, but down on canvas with paints, pens, and any other tool I could be creative with. Art has always been my passion.
A new Chandra X-ray Observatory image of Messier 82, or M82, shows the result of star formation on overdrive. M82 is located about 12 million light years from Earth and is the nearest place to us where the conditions are similar to those when the Universe was much younger with lots of stars forming.
M82 is a so-called starburst galaxy, where stars are forming at rates that are tens or even hundreds of times higher than in a normal galaxy. The burst of star birth may be caused by a close encounter or collision with another galaxy, which sends shock waves rushing through the galaxy. In the case of M82, astronomers think that a brush with its neighbor galaxy M81 millions of years ago set off this torrent of star formation.
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