The Earth is the centre of a spherical shape known as the observable universe.
How quickly is the Universe disappearing from our reach?
If The Universe Is 13.8 Billion Years Old, How Can We See 46 Billion Light Years Away?
Media
Sabine Hossenfelder – How Did the Universe Begin? (6:43)
Jo Dunkley: 2020 Breakthrough Prize Symposium (21:17)
Cecilia Payne-Gaposchkin was the first astronomer to propose that stars are made primarily of hydrogen and helium.
Great Minds of Astronomy: Cecilia Payne-Gaposchkin (5:34)
Universe Size Comparison | 3d Animation Comparison | Stars Real Scale Comparison (4:27)
Henrietta Swan Leavitt discovered the relationship between period and luminosity in Cepheid Variables. Leavitt’s Law allows astronomers to measure the distance to galaxies.
The Lawrence Hall of Science – The Story of Henrietta Swan Leavitt (8:12)
Vox – The 1995 Hubble photo that changed astronomy (5:26)
Hubble’s UItra Deep Field in 3D is an amazing journey through space and time (6:03)
The Hubble Ultra Deep Field in 3D (4:16)
Supernova 1987A was co-discovered by a Canadian astronomer.
NASA Video – Zooming in on Supernova 1987A (0:32)
Particle Agglomerates in Microgravity (4:28)
Dr. Becky – The Horizon Problem – The Universe’s Biggest Unsolved Mystery (13:34)
Dr. Becky – The Most Ambitious Astronomy Project Ever | The Vera Rubin Observatory (14:28)