A daily update by email. Science news, great photos, sky alerts.
In 2024, Easter falls on March 31. It falls on the first Sunday after the first full moon after the March equinox. More about the date of Easter, here.
Day and night are mostly equal on the equinox. There's a bit more daylight because the sun is a disk, not a point, and Earth’s atmosphere refracts sunlight.
We will have 5 new supermoons in a row, starting on January 11, 2024. The April 8, 2924, new supermoon will result in the April 8, 2024, total solar eclipse!
The moon is near Venus on November 9, 2023. That makes that morning a great time to try to spot Venus in the daytime sky. Read how here.
Another annular solar eclipse - similar to the one on October 14, 2023 - will visit almost the same geographical region in 2077.
The summer solstice on Mars' northern hemisphere occurs at 23:35 UTC today, July 12, 2023. At that time, the north pole is pointed most directly toward the sun.
Love astronomy, but don't like to stay up late? Here are the top 10 space objects you can see - under the right conditions - during the day.
The dog days of summer are named for the Dog Star Sirius - the brightest star in the sky - in the constellation Canis Major the Greater Dog. Learn why here.
Fact-checkers at timeanddate.com discovered 99% of the world's population experiences some sunlight at 11:15 UTC on July 8 ... along with many other dates!
The northernmost sunset (and sunrise) happens at the June solstice. Here's some quick info that'll help you connect with nature on this special day.
The new moon of January 21, 2023 will be the closest new moon to Earth in a period of 1,337 years. Read more about the closest new moon here.
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.
Isaac Newton, born on January 4, 1643, discovered the laws of motion and other principles that laid the foundation of physics and astronomy.
SpaceX will launch a set of communications satellites for rival OneWeb on Thursday, December 8, 2022. Find out how to watch the livestream here.
The Lucy spacecraft is heading to Jupiter's Trojan asteroids. On October 16, 2022, the spacecraft will get a gravity assist from Earth.
Looking for this week’s Launches blog? Click here. EarthSky’s Launches blog, with Dave Adalian and Lia De La Cruz, brings...
Launches updates for the week of August 1, 2022: South Korea launches its first moon mission, Elon Musk hints at a date for Starship, and more.
China launched an unknown payload on Friday (July 29, 2022). An uncontrolled re-entry was planned, for the 2nd time this month.
Launches and spaceflight updates for the week of July 18, 2022. Pop band goes to space. Will Artemis 1 launch on August 29? SpaceX breaks a record. Buzz Aldrin sells moon memorabilia.
SpaceX plans to launch 49 of its Starlink internet satellites today, February 3, 2022, in the 3rd of 3 Falcon 9 rocket launches over 4 days.