Sky & Telescope September 2023 Magazine
In this issue, learn about the radio array built with off-the-shelf parts — including some from a baking company. But don’t let its simple design fool you: DSA-2000 will offer a sharp-eyed view of the radio sky. First results are expected in 2027; while you wait, dive into the past. Edwin Hubble discovered the expanding universe 20 years ago, in 1923, but the galaxy data he obtained from fellow astronomer Vesto Slipher was key to his realizations. Read Slipher’s side of the story. Then learn more about one of the key variable stars in Andromeda that was instrumental to Hubble’s discovery. With a big enough telescope, you can see it for yourself! Also in this issue, learn about the open-source software named NINA, which you can use to guide your astrophotography equipment, and find out how watching stars blink out has helped astronomers map asteroids from across the solar system.
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