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One Earth. One sky. One moon phase (more or less) from all of Earth. So why (and how) does the moon look different from different parts of Earth?
Mars is getting brighter. By mid-2018, Mars will be at its brightest since 2003, when it was closer and brighter in our sky than in some 60,000 years.
In 2018, April 22 is the peak morning. The moon, near the 1st quarter phase, is out of the way. Expect 10 to 20 meteors per hour at the peak.
You don’t need to find the radiant to see the meteors. But it’s fun to spot, near the bright star Vega.
A beautiful chart from astronomer Guy Ottewell, showing the evening sky on Astronomy Day 2018. Plus links to Astronomy Day events and other info.
How do astronomers determine masses for distant space objects? Here’s one example – using the moon’s orbit as a baseline to find the mass of our sun – from EarthSky’s Bruce McClure.
The Big Dipper is easy. And, once you find it, you can find the Little Dipper, too.
Venus blazes away in the west at evening twilight. Jupiter rises at mid-to-late evening and shines brightly before dawn. After the Mars and Saturn conjunction on April 2, the pair can be seen all month before dawn, near one another.
The March 31 Blue Moon is the 2nd Blue Moon of 2018. We haven’t had 2 Blue Moons in a year since 1999 and won’t again until 2037.
Yes, April 1 is an early Easter, but 2018 doesn’t hold a record for the earliest possible Easter. How the date of Easter is determined, here.
Mizar and its fainter companion star Alcor are easy to spot in the Big Dipper’s handle.
Happy equinox! The March 20, 2018, equinox is an event that happens on our sky’s dome and a seasonal marker in Earth’s orbit around the sun.
Equinox means “equal night.” And you might hear day and night are equal at the equinoxes. Yet Earth’s air and our sun conspire to give us more daylight at an equinox.
Wow! So many of you are catching the moon, Venus and Mercury after sunset. Thank you for all your photos. We wish we could post them all!
On a dark night, look for it as a smudge of light, with 3 times the moon’s diameter. It’s really a wondrous cluster of stars called the Beehive, or M44.
The edgewise view into our own galaxy, looking toward the galaxy’s heart, from EarthSky community members who ventured into the cold and darkness before dawn in February 2018.
Photos from the EarthSky community of the March 1-2, 2018, full moon, the 1st of 2 full moons for this month!
When a camera captures a star’s movement across the sky, it’s called a star trail. An astrophotographer explains how he does it.
It takes up to 30 minutes for your eyes to adapt to the dark. And a country location is best. Then, on a clear night with no moon … how many stars?
How to find to find the constellation Taurus in your night sky. Plus the names of some of its bright stars and star clusters and its mythology.
A word about the moon’s distance tonight
Star trails show celestial equator