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California

PoindexterOglethorpe

(26,990 posts)

1. An awful lot of astronomy is no longer done with visible light.

Reply to hunter (Original post)

Sun Oct 8, 2023, 06:53 PM

Oct 2023

X-rays, radio waves, infrared, near infrared, and so on.

For instance, even though we do have a handful of actual photographs of exo-planets, most are found by indirect methods: radial velocity (also called Doppler metho), micro lensing, and wobble of the star caused by a very massive planet, especially one that is close to the star.

My Son The Astronomer is researching radial velocity.

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Saving Mt. Wilson Observatory... [View all] hunter Oct 2023 OP

An awful lot of astronomy is no longer done with visible light. PoindexterOglethorpe Oct 2023 #1

Short story is that they need money for maintenance and better public access. usonian Oct 2023 #2