There's an estimated 10% chance that two large pieces of orbiting space debris could collide tomorrow night at an altitude of 615 miles and a relative velocity of 32,883 mph.
Now it’s coming to light that estimates from other bureaus had a *much* wider miss margin between these two orbital objects, up to nearly 600 meters. Still close but certainly not as dramatic. 🤨
Cool 3D rendering of the Milky Way galaxy by @StefanPWinc showing the curve of the galactic plane and dust using data from GAIA (ht @runnymonkey)
The galaxy our Sun and solar system resides within is a barred spiral galaxy about 105,700 light-years across. Its plane is not a perfectly flat disk though; astronomers have found that it has a warped shape. earthsky.org/space/milky-wa…
From Earth the Milky Way is a hazy band of stars with dark clouds of dust stretching across the sky, best visible from dark locations. We can't see the spiral shape because we're inside one of the arms, looking into the plane of it.
This image shows the limb of Saturn's moon Iapetus, captured by #Cassini on Sept. 10, 2007. A ridge of 10km-high (6.2 mile) mountains encircles the equator, possibly the remains of a former satellite that broke apart as its orbit degraded. Iapetus is 1,470 km (913 miles) wide.
Here's a wide-angle view of Iapetus from the same observation set on 9/10/07. Color comp made from images acquired in IR, G, and UV.
Iapetus is an icy moon stained dark. This "telephoto" view of the eastern limb region from the previous image shows where dark material has coated its leading forward-facing side. This dark material originates from even more distant moon Phoebe, which is likely a captured comet.