Tonight will be a good time to look up at the sky.
That’s because the second supermoon of 2015 will happen on the night of Sept. 27 and last into the early morning hours of Sept. 28.
A supermoon is when the full moon is closer to earth than a typical full moon, and appears slightly bigger and brighter than normal.
According to Bishop Museum, the actual moment of the full moon occurs Sept. 27 at 4:51 p.m. HST, or about one and a half hours before the moon actually rises in Hawaii, at 6:30 p.m. HST.
However, this particular supermoon is still likely be a stunner (weather-permitting), since it will be the closest of this year’s supermoons at a distance of 221,754 miles.
In comparison, the average distance between the earth and the moon is 240,000 miles.
For half of the world, including most of the United States, and Central and South America, the night includes a second astronomical event: a total lunar eclipse, which can only occur during a full moon.
All of Central and South America, and the eastern part of North America will be able to see the eclipse in its entirety, while the western half of the U.S. and Canada will see the moon rise in eclipse. A supermoon/lunar eclipse only happens once every few decades. The last combination happened in 1982 and the next one won’t happen until 2033.
Unfortunately, the eclipse ends Sept. 27 at 6:27 p.m. HST, which is just as the moon rises in Hawaii. So while Hawaii will experience the supermoon, we won’t see the “super blood moon.”
Most of Alaska will also miss the eclipse for this very reason.