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Astronomy Essentials
2024 Lyrid meteor shower: All you need to know
The best time to watch the Lyrid meteor shower in 2024 is before dawn on the morning of April 22.
April 18, 2024
Brightest Stars
Sun
Sun news April 18: Cluster of sunspot regions firing jets and flares
April 18, 2024, sun news. A big cluster of sunspot regions has been firing jets and flares all day. Three M flares keep sun activity at moderate.
Astronomy Essentials
Tonight
Visible planets and night sky guide for April
Visible planets and star guide for April 2024. See a 1-minute video preview of moon phases for the month of April, linked here.
April 18, 2024
Sky Archive
Tonight
Kochab and Pherkad: Outer bowl stars of the Little Dipper
Kochab and Pherkad are the two outer stars in the bowl of the Little Dipper. They were the pole stars from 1500 BC to 500 BC.
April 18, 2024
Space
Meet Gaia BH3, our galaxy’s most massive stellar black hole
Astronomers have discovered the most massive stellar black hole yet discovered in our home galaxy, the Milky Way. They call the object Gaia BH3.
April 17, 2024
Earth
Reforestation in US East helped keep it cool
According to new research, reforestation in the eastern U.S. helped counter rising temperatures in the 20th century. Learn more here.
April 17, 2024
Tonight
Hercules is between 2 bright stars: Vega and Arcturus
The bright stars Arcturus and Vega can help you find the constellation Hercules and its Keystone asterism. Hercules is home to 2 fabulous globular clusters.
April 17, 2024
Space
How Pluto got its heart
The New Horizons spacecraft saw a heart-shaped feature on Pluto during its 2015 flyby. New computer simulations suggest an impact created Pluto's heart.
April 16, 2024
Constellations
Meet Sextans, the constellation of the sextant
Sextans the Sextant is in a dim patch of sky between Leo and Hydra that is home to some interesting galaxies, and one of the largest supermassive black holes.
April 16, 2024
Space
Large asteroid safely passed Earth: See pic here!
Check out the image of the large asteroid 2013 NK4 - which is about 2,000 feet (610 meters) wide - that safely passed Earth on April 15, 2024.
April 15, 2024
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