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Measuring the speed of winds on Mars using sound
Scientists have developed a new technique - using the travel time of sound - to measure the speeds of winds on Mars with greater accuracy than ever before.
August 28, 2024
Ancient Mars lake was larger than any on Earth
Lake Eridania is our earthly name for the largest known Mars lake. This ancient lake was bigger than any lakes on Earth. Where did it go?
August 26, 2024
Voyager 2: Our 1st and last visit to Neptune
On today's date, August 25, 1989, Voyager 2 flew over the north pole of Neptune, making its closest approach to a planet in its outer solar system Grand Tour.
August 25, 2024
Polaris, the North Star, has spots on its surface
Observations of Polaris, the North Star, show large bright and dark spots on its surface. It's the first glimpse of the surface of a Cepheid variable.
August 25, 2024
Dinosaur-killing asteroid came from beyond Jupiter
An international team of scientists has determined that Chicxulub dinosaur-killing asteroid was carbonaceous and originated from the deep outer solar system.
August 22, 2024
Moon and Saturn close together this week. See the images!
Did you miss the moon and Saturn close together on August 20, 2024? Here's a gallery and video full of images of the event. Enjoy!
August 22, 2024
Oceans of water on Mars deep underground?
Where did Mars' water go? A new study using data from NASA's InSight mission provides evidence for oceans of water on Mars, deep below the surface in the crust.
August 20, 2024
LIVE on Monday: Super Blue Moon
Join EarthSky team members LIVE beginning at 12:15 p.m. (17:15 UTC) on Monday, August 19, 2024 ... to talk about Monday night's Super Blue Moon.
August 19, 2024
A solitary star speeding across the Milky Way
Citizen scientists have discovered a solitary star speeding so fast that it will eventually escape the Milky Way's gravity and shoot into intergalactic space.
August 18, 2024
Asaph Hall finds Mars moon Phobos 147 years ago today
On this date in 1877, American astronomer Asaph Hall discovered Phobos, the larger of Mars' 2 moons. He discovered the other moon, Deimos, later that year.
August 17, 2024
