In video footage, a small object streaks across the sky before a U.S. Navy fighter jet's tracking system locks on and follows it, reports AP.
What's new: "The Navy isn't offering a public explanation ... for exactly what that object was. But the service is confirming the authenticity of that video and two others taken from its planes in 2004 and 2015," per AP.
Saturn's rings may be more ancient than previously thought, according to a new analysis published in the journal Nature Astronomy this week.
Why it matters: The true age of the rings has major implications for the age of Saturn's moons. Many scientists think that Saturn's moon Enceladus is one of the places in our solar system most likely to host life, but if the moon is young, life may not have had enough time to develop.
A photo taken in May by NASA's Mars Reconnaissance Orbiter shows an avalanche of ice falling on the planet.
What they're hearing: "Every spring the sun shines on the side of the stack of layers at the North Pole of Mars known as the north polar layered deposits. The warmth destabilizes the ice and blocks break loose," NASA said in an image description.
