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Nebula M42

Credit: Credit: Bob Shabowski
M42 - 6 Images stack, 72 seconds each with Nikon CP 4500 ISO400 F2.6 and 10"SCT f10 w 35mm Panoptic afocal on Jan 23, 2003 1 degree F.

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Quote of the Day

Science means simply the aggregate of all the recipes that are always successful. All the rest is literature.
- Paul Valéry (1871 - 1945)

Fact of the Day

A day on Jupiter is only 9 hours and 48 minutes long. Such fast rotation causes Jupiter to be somewhat squashed due to centrifugal force: its polar radius is 4000 km less than its equatorial radius (the latter being 71,392 km). That means you'd weigh almost 25% more at Jupiter's poles than at its equator, that is, if you could find a place to stand! So a 100 pound person (on Earth) would weigh 230 pounds at Jupiter's equator but 285 pounds at the pole!

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Of the following instruments, which one is not an adding machine?
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Calculator
Abacus
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