A satellite image from January 2019 shows launch pad 39A at Cape Canaveral, Florida. From there - on July 16, 1969 - a Saturn V rocket carrying the crew of Apollo 11 launched humanity's historic voyage to the moon.
Textures and patterns, from clumpy to straw-like, pop out of these images from the Cassini mission. "It’s like turning the power up a notch on what we could see in the rings," said a scientist.
Last week, the Mars Curiosity rover detected its largest-yet measurement of methane. It's exciting because microbial life is an important methane source on Earth (though methane can also be created in other ways).
Liftoff is targeted at 11:30 p.m. EDT, with a 4-hour launch window. SpaceX is calling the launch its most difficult ever, because the rocket must release 24 satellites into 3 different orbits.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. She and her husband live in Tennessee, where they enjoy guitar playing and singing. They have 2 grown sons.