Filed under: Tomorrow's BPP
Win Rosenfeld
1:25 PM ET
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12-24-2007
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Filed under: The Dagobah System
Summer Ash, astrophysicist to the (radio) stars, sends this shot of eggnog from the heavens, where the galaxy is staging a Christmas Eve special. Or something.
Special to the BPP from Summer Ash:
Last Monday, we had our closest approach to Mars. However, orbital mechanics gives us something else to celebrate this holiday season as Earth, Mars, and the sun will all align on Christmas Eve. If the holiday weather is in your favor for a clear night, you should be able to see it fairly high in the sky, somewhat near the just past full moon, glowing reddish-orange. And you shouldn't have to look to hard, because it will easily outshine the stars.
This alignment is called "opposition," as Mars will be directly opposite in the sky from the sun with respect to Earth, or more simply Earth is directly between the sun and Mars, and it happens roughly once every two years. Tonight's date between Mars and Earth happens because both planets take a different amount of time to orbit the sun. Earth takes 365+ days and Mars takes approximately 687 days. Therefore, Earth moves faster in it's orbit and gradually "laps" Mars in the race around the sun. The approach and subsequent passing of Mars is what occurs every two years.
Continue reading "Tonight: Rudolph the Red Planet" »
Laura Conaway
12:02 PM ET
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12-24-2007
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