Come abbiamo scoperto pianeti intorno ad altre stelle?

We know of over 4,000 planets orbiting other stars (aka extrasolar planets, or exoplanets), and we've discovered them all in the last 25 years. That's right: until 1995, we still had no evidence of planets orbiting main-sequence stars like our Sun. Why? Because observing a planet orbiting another star isn't easy. Let's try to understand how. = = = WRITTEN AND PRODUCED by Amedeo Balbi, professor of astronomy and astrophysics at the University of Rome Tor Vergata. MOTION GRAPHIC by Litchistudio.com COVER IMAGE: ESO / L. Calcada - - ALL MY BOOKS on Amazon: ► https://amzn.to/31irdTn MY OFFICIAL PAGE: ► https://www.amedeobalbi.it YOU CAN ALSO FIND ME ON: ► Instagram:   / amedeobalbi   ► Twitter:   / amedeo_balbi   ► Facebook:   / amedeo.balbi   #exoplanets #astrophysics #space #amedeobalbi