If you were lucky enough to live in Asia or the western
But why does an annular eclilpse happen, and why is it so rare?
The answer is tied to the supermoon from a few weeks ago. That giant—although sometimes deflated—lunar spectacle occurred because the moon was at its fullest when it was also the closest to Earth it will be all year. The astrophysical term for the latter is perigee, which is greek for GIANT WOLFMAN MOON.
But because the moon's orbit follows an ellipse, if it's closer than usual to the Earth in one cycle that means it will also end up being further away. That was last night: A moon so tiny that it failed to block out the sun when their paths crossed.
The picture above was taken in
If you missed out last night, don't fret. The next annular is expected May 10, 2013, and even if it skips your corner of the Earth again you should be able to watch online. Who knows? Maybe our post-apocalyptic war lords will make a holiday out of it.

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