The 'heliosphere', the name given to the region of the sun's influence, may not have the comet-like shape predicted by existing models, say researchers.
As the solar wind flows from the sun, it carves out a bubble in the interstellar medium. Models of the boundary region between the heliosphere and interstellar medium have been based on the assumption that the relative flow of the interstellar medium and its collision with the solar wind dominate the interaction. This would create a foreshortened "nose" in the direction of the solar system's motion, and an elongated "tail" in the opposite direction.
Okay, the world is not going to end in 2012. The source of this info? The Mayans
. The living Mayans. You didn't think all that's left is stone tablets, did you? In that AP news report, a Mayan Indian Elder named Apolinario Chile Pixtun, among others, gives the straight scoop.
One. It's not the end of the world
Two, the supposed stone that dates an Apocalypse in 2012? It's with some stones that cover events in 4772 as well. So if there is a Mayan Apocalypse, it's, umm, a non-apocalyptic one.
has produced a jaw-dropping graphic depicting the history of human space exploration since Sputnik in 1957. The original version
("original artwork is by Sean McNaughton on the National Geographic staff and Samuel Velasco of 5W Infographics") at the National Geographic
website is pannable/clickable/etc-able.
I'm sitting at "Beyond the Decade: The Future of International Astronomy", a conference today at the National Academies. The conference is small (53 people so far) but rich in material, providing a crunchy look at where astronomy is heading.
I now own half a satellite... and in a way, you do to. The Scientific Blogging "Project Calliope" satellite order has been placed! Thanks to Hank's SB contribution, we have the 'science' half covered. The other half of the satellite is up to the music community, and I'll let you know as soon as that's signed, sealed and delivered.
Half is crucial. WIth half, we are 'go' for construction. With our first half payment, we get:
- the actual hardware
- all the detailed tech specs
- a slot on the launch schedule
Want a chance to see the water on the moon in real life? Wake up early Friday morning (if you live in the Americas), and get out your telescope.
NASA’s Lunar Crater Observation and Sensing Satellite (LCROSS) is being crashed into the moon, on purpose, along with the now empty 2.2-ton rocket that launched it this past June. The rocket will crash first, around 7:31am EDT, into the crater Cabeus in the south polar region. It should produce a plume of debris over 6 miles high. That plume is what you might be able to see with your telescope.
Just why do we have a space station, anyway? That's a question of relevance, because it turns out we might not have one after 2015. The International Space Science Station (ISS) is a football-field sized structure able to support six people 220 miles above us. It is a symbol of international cooperation, a marvel of technology, a new site for tourism and, to some, a project to be terminated in 2015.
What we've gotten from it? Some intangibles, some useful stuff.
- advancing our space capability
- increasing our limits on how long people can live in orbit
- keeping nuclear scientists from going rogue after the breakup of the Soviet Union
- research that benefits Earth
An article in this week's edition of Nature adds to the mysteries surrounding 'dark matter'. Should we abandon this enigmatic concept of invisible matter that exerts gravitational attraction but is otherwise undetectable? Could it be that we simply do not understand the long-range behavior of gravity?
Is 'dark energy', the mysterious unidentified thing that would be a nice explanation for a lot of universal questions, physics or religion? Maybe baryon oscillations can tell us.
Baryon oscillations began when pressure waves travelled through the early universe. An ambitious attempt to trace the history of the universe, called the Baryon Oscillation Spectroscopic Survey (BOSS), has seen first light. BOSS, a part of the Sloan Digital Sky Survey III (SDSS-III), took its first astronomical data on the night of September 14th.
There's drama in two galaxies in the Virgo Cluster, NGC 4522 and NGC 4402. An extremely hot X-ray emitting gas known as the intra-cluster medium lurks between galaxies within clusters and, as galaxies move through this intra-cluster medium, strong winds rip through galaxies distorting their shape and even halting star formation - a process known as "ram pressure stripping".
Result: Peculiar looking galaxies.
Ram pressure is the drag force that results when something moves through a fluid — much like the wind you feel in your face when bicycling, even on a still day — and occurs in this context as galaxies orbiting about the centre of the cluster move through the intra-cluster medium, which then sweeps out gas from within the galaxies.