Does the Sun return to the same spot on the sky every day at the same time?
On the August 18 night flight from San Francisco to Zurich,
Irregular galaxy NGC 55 is thought to be similar to the Large Magellanic
Cosmic dust clouds and young, energetic stars
Inside the Cocoon Nebula is a newly developing cluster of stars.
There's a "camera" comet now moving across the sky.
How could a galaxy become shaped like a ring?