Why no eclipse every full and new moon?

In 2019, there are 13 new moons and 12 full moons, but only 5 eclipses – 3 solar and 2 lunar.

Will star Betelgeuse explode?

Yes, it will. The star Betelgeuse will run out of fuel, collapse under its own weight, and then rebound in a spectacular supernova explosion. Someday … but probably not soon.

Why is Mars sometimes bright and sometimes faint?

Why was Mars brighter in our sky in 2018 than since 2003? And why is it so much fainter now? What about the rest of this year? Will Mars brighten again in 2019?

What’s a Blood Moon?

The upcoming total lunar eclipse on the night of January 20-21 is being called a Blood Moon eclipse. Why? Here’s the reason.

What is the zodiac?

Maybe you associate the word ‘zodiac’ with astrology, but it has an honored place in astronomy, too. It’s defined by the annual path of the sun across our sky.

Sun in zodiac constellations, 2019

Sun-entry dates to zodiac constellations in 2019, using boundaries for constellations set by the International Astronomical Union in the 1930s.

Lengths of lunar months in 2019

The longest lunar month in 2019 starts with the new moon on January 6, and concludes with the new moon on February 4. Its duration will be 29 days 19 hours and 35 minutes.

Dates of solar and lunar eclipses in 2019

Dates of all solar and lunar eclipses this year. Is there one you can see?

Top 7 tips for safe solar eclipse viewing

Safe – and unsafe – solar eclipse viewing methods. Order your eclipse glasses now!

Are December’s solstice and January’s perihelion related?

December solstice 2018 was December 21. Earth was closest to the sun for 2019 on January 2-3. Coincidence?

2019 EarthSky Fundraiser

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