| | Between now and early January, you'll find us in your inbox from time to time, but not every day. Happy new year! | | |
This weekend … Don't miss the young moon and Venus | | If your sky is clear, you can catch the whisker-thin crescent moon - and possibly Saturn - in the west at dusk tonight. You'll surely see dazzling Venus, above them. This young moon will be fresh from its ring of fire eclipse a day earlier. On Saturday and Sunday evenings, the moon will be even easier to catch. It'll be closest to Venus on Saturday. A wondrous sky scene for the whole world! #OneSky Read more. | | |
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| | Correction: We mistakenly said that - for an annular solar eclipse to occur - the new moon has to be near apogee, its farthest point from Earth. It's often true that - during an annular eclipse - the moon is near apogee. But that wasn't the case on December 26. In fact, the December new moon was almost exactly at its mean distance from Earth. Yet - at mid-eclipse - the moon appeared too small from Earth to cover the sun's disk completely. Why? The answer is that - at this time of year - Earth is close to perihelion, its closest point to the sun for the year. In 2020, Earth's perihelion will come on January 5 at 07:48 UTC. So, in our sky around now, the sun's disk now appears slightly larger than usual: hence, the December 26 annular solar eclipse. Cool ... yes? | | |