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How the moon reveals the sun’s mass
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.
April 9, 2018
See it! Young moon, Venus, Mercury
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!
March 19, 2018
See the early morning Milky Way
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.
March 4, 2018
See it! 1st March full moon
Photos from the EarthSky community of the March 1-2, 2018, full moon, the 1st of 2 full moons for this month!
March 2, 2018
Will you see the Humanity Star?
The debate surrounding the Humanity Star. Is it possible to see? Can you see it from your location? How to try to see it, if it's visible, here.
February 20, 2018
Return of the young moon, and Venus
Two lovely and hopeful signs in the sky ... the returning young moon and Venus. Photos here from the EarthSky community.
February 19, 2018
Why no full moon in February 2018?
January and March 2018 have 2 full moons. February has none. Astronomer David Chapman explains moon cycles and calendars, with a word about moon names in the indigenous Mi'kmaw nation of Canada's northern woodlands.
February 6, 2018
Lengths of lunar months in 2018
This new moon ends the longest lunar month of the 21st century and begins the longest lunar month of 2018.
January 16, 2018
Best photos: Morning planets!
On Sunday morning, Jupiter and Mars were half a moon-diameter apart. Now the moon is sweeping past. Plus Mercury and Saturn are in conjunction this weekend. Photos here.
January 15, 2018
Close and far moons in 2018
In 2018, the moon swings farthest from Earth for the year on January 15, only 2 weeks after coming closest to Earth for the year on January 1.
January 15, 2018
