Uploaded November 2022 | Updated September 2026, 3 weeks ago

---

What’s impossible today becomes possible tomorrow, and this is especially true in astronomy. Here are three videos about things we could only once imagine.

Hosts: Hank Green, Caitlin Hofmeister, Reid Reimers
----------
Huge thanks go to the following Patreon supporter for helping us keep SciShow Space free for everyone forever: Jason A Saslow, David Brooks, and AndyGneiss!

Support SciShow Space by becoming a patron on Patreon: patreon.com/SciShowSpace

Or by checking out our awesome space pins and other products over at DFTBA Records: dftba.com/scishow
----------
Looking for SciShow elsewhere on the internet?
SciShow on TikTok: tiktok.com/@scishow
SciShow Tangents Podcast: scishowtangents.org
Facebook: facebook.com/scishow
Twitter: twitter.com/scishow
Instagram: instagram.com/thescishow
----------
Sources:

Great Minds of Astronomy: Cecilia Payne-Gaposchkin

youtube.com/watch?v=I_qF-jTY2zY&ab_channel=SciShowSpace

The Impossible Element Hiding in the Sun

youtube.com/watch?v=GcfF40CPdl0&ab_channel=SciShowSpace

White Holes: An Impossible Possibility

youtube.com/watch?v=Y1HqOEbq2L4&ab_channel=SciShowSpace