Skywatcher Tim McCord of Entiat, Washington caught this amazing view of the March 19, 2011 full moon - called a supermoon because the moon was at perigee, the closest point to Earth in its orbit - using a camera-equipped telescope. (Tim McCord)
Skywatchers and Navy ships at sea take note: The biggest full moon of the year is due to arrive this weekend.
The moon will officially become full today (Saturday, May 5) at 11:35 p.m. EDT. And because this month’s full moon coincides with the moon’s perigee — its closest approach to Earth — it will also be the year’s biggest.
The moon will swing in 221,802 miles (356,955 kilometers) from our planet, offering skywatchers a spectacular view of an extra-big, extra-bright moon, nicknamed a supermoon.
And not only does the moon’s perigee coincide with full moon this month, but this perigee will be the nearest to Earth of any this year, as the distance of the moon’s close approach varies by about 3 percent, according to meteorologist Joe Rao, SPACE.com’s skywatching columnist. This happens because the moon’s orbit is not perfectly circular.
This month’s full moon is due to be about 16 percent brighter than average. In contrast, later this year on Nov. 28, the full moon will coincide with apogee, the moon’s farthest approach, offering a particularly small and dim full moon.
Though the unusual appearance of this month’s full moon may be surprising to some, there’s no reason for alarm, scientists warn. The slight distance difference isn’t enough to cause any earthquakes or extreme tidal effects, experts say.
Good news, sailors! No epic moon-induced maritime hysteria. This time.
Read the rest of the article here.
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