Artist impression of an extrasolar planet. Image credit: NASA/JPL
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Look down at your feet. There… you’re looking at a planet. Now look into the night sky and you should be able to spot a few more. After that, spotting additional planets becomes really hard, especially when you’re trying to find them orbiting other stars. This week we discuss the techniques astronomers use to locate distant worlds.

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Centauri Dreams by Paul Gilster
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I wanted to take a moment and point your browsers at a few websites that I really enjoy, and I think you will too. You’ve probably heard of the Bad Astronomer, but do you know of the Angry Astronomer? Jon Voisey is an astronomy major at the University of Kansas. Jon has recently been journaling the battle against intelligent design and antiscience movements, but if you dig a little deeper into his archives, you’ll see some great articles explaining concepts in astronomy.

A second site I really enjoy is called Centauri Dreams, written by Paul Gilster. Paul is the author of the similarly named book, which we reviewed here on Universe Today. Paul’s website supports his investigation into concepts for interstellar travel – realistic ways that we could actually get spacecraft from here to neighbouring stars. Roll through the archive, it’s absolutely fascinating reading.

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The NGC 7331 Group – Credit: R. Jay GaBany
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Greetings, fellow SkyWatchers! As the week opens, we’re treated to several lovely views of the waning Moon and the bright winter objects just before dawn. Early evening dark skies mean an opportunity to galaxy hunt and study planetary nebulae. Mark your calendar to enjoy a weekend meteor shower, too! It’s time to dust off the scopes and head out, because…

Here’s what’s up!

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Supernova remnant RCW 86. Image credit: ESA/Chandra
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Ancient Chinese astronomers recorded the occurence of a bright star in the sky in 185 AD; probably a supernova explosion. And now modern astronomers think they’ve found that explosion’s corpse: supernova remnant RCW 86. New calculations have found that RCW 86 is about 2000 years old, making it the best candidate for this ancient supernova. This new data was gathered using the XMM-Newton and Chandra X-Ray observatories.

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Brown dwarf circling HD 3651. Image credit: NASA / JPL-Caltech / K. Luhman, Penn State / I.B. Patten/CfA
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NASA’s Spitzer Space Telescope has directly imaged a small brown dwarf star orbiting a larger star – the first time this has ever been seen. The brown dwarf, HD 3651, is classified as a “T dwarf”, has about 50 times the mass of Jupiter, and orbits about 10 times the distance from the Sun to Pluto. Astronomers theorized that the system contained a brown dwarf, because a Saturn-sized planet had a strangely elliptical orbit; something was tugging on it.

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International Space Station. Image credit: NASA
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The crew of the International Space Station had a bit of a scare today when they smelled a noxious odor in the air of the confined station. It turned out the smell was coming from a malfunctioning oxygen generator. NASA now believes a rubber gasket in the generator overheated, creating smoke and an odor. The event won’t cause any problems with the upcoming crew change.

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Soyuz launch. Image credit: NASA
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A Russian Soyuz rocket blasted off from the Baikonur cosmodrome early Monday, carrying a new team to the International Space Station. On board are Expedition 14 Commander Michael Lopez-Alegria and Flight Engineer Mikhail Tyurin, as well as space tourist Anousheh Ansari. The crew of Expedition 14 will remain on board the station, while Ansari will remain on board for a week, and then return with the crew of Expedition 13. They’re expected to arrive at the station early Wednesday.

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