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If you were looking with the eye alone, how far away in space would our planet Earth still be visible?
3122 Florence passed yesterday, biggest near-Earth object to pass so close in a century. Radar revealed 2 orbiting moons! Plus a chart that’ll help you spot the asteroid.
Jupiter and Saturn are evening planets. Venus, Mercury and Mars are morning planets. Watch for the close conjunction of Mercury and Mars around mid-September.
No matter where you live worldwide, Capricornus the Sea-goat climbs highest in the sky in early September. How to see it, and how a sea-goat came to reside among the stars.
While not one of the most conspicuous stars in the night sky, Alderamin – aka Alpha Cephei – is easy to spot, and is interesting for its rapid rotation on its axis.
In 2017, the autumnal equinox for the Northern Hemisphere comes on September 22. Official Harvest Moon is October 5, but the September 5-6 full moon shares the characteristics of a Harvest Moon.
What could be more fun on a cool, crisp autumn evening than a star party? Find a 2017 star party near you.
Will the sky on September 23, 2017 mirror “signs” from the Book of Revelation in the Bible? An astronomer responds.
How can we comprehend the distances to the stars? This post explains light-years in terms of a scale of miles and kilometers.
After the August 21, 2017 eclipse, the next total solar eclipse visible from North America will be April 8, 2024.
Year’s fastest sunsets around equinoxes
See it! Dance of planets before dawn