ALAMEDA, CA — Some sunset chasers are all about the orange or pink skies often evident after the sun is below the horizon, ...

Look carefully at these photos from Mollie Holleman. Shot from Hallandale, you can see the silky streaks of what appears to be a rainbow visible high above. It’s cloud iridescence, and it’s often ...

As the Curiosity rover explores its way around Mars, it isn’t only looking down at the martian rocks and regolith — it is also looking up at the martian sky. Like Earth, Mars has its own seasonal ...

Mars will probably become the first planet in this Universe the human race will ever visit, and only then will we begin to get a true sense of the place. Because, even if we feel like we know a lot ...

NASA's Curiosity Mars rover captured this feather-shaped iridescent cloud just after sunset on Jan. 27, 2023, the 3,724th Martian day, or sol, of the mission. Studying the colors in iridescent clouds ...