What’s Up this Week: January 1 – January 7, 2007

Greetings, fellow SkyWatchers… Welcome to the new year and 365 more nights with you! Thanks to everyone for their kind words about the new edition and how great the softcover book turned out. The sky is at the limit as we begin 2007 exploring the Moon and keep on reaching for the stars. Now, let’s head out into the night because…

Here’s what’s up!
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Close Call with Asteroid 2006 XG1 in 2041

Asteroid Eros (not 2006 XG1). Image credit: NASAI don’t want to get you worried, or even mildly concerned. No need to panic. In fact, just read this little piece, and remark with interest that an asteroid is going to get really really close to the Earth on October 31, 2041. It might – I repeat might – have a small, insignificant chance of hitting the Earth and causing regional devastation. Like a 1 in 40,000 chance. Those are pretty good odds when you think of it.
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Podcast: Across the Electromagnetic Spectrum

Galaxy in the infrared spectrum. Image credit: SpitzerWe see the Universe in visible light with our photon detecting eyes. We can feel infrared heat with our photon detecting hands, and we get sunburns with our ultraviolet photon detecting skin (ouch). But there’s a whole spectrum of photons out there, from radio waves to gamma rays that astronomers use to understand the Universe. It’s time to see the whole picture.
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Use Galactic Gravitational Lenses to Really See the Universe

Galactic lens in action. Image credit: CFHTTo see any distance in space, you need some kind of telescope. We’ve got some pretty powerful ones here on Earth, but nature has us beat with gravitational lenses. This is a phenomenon when a relatively nearby object passes directly between us and a more distant object. The gravity from the nearby object acts as like a telescope lens to bend light and magnify the more distant object.
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