Carl Sagan talks about our future and the exploration of space
Our species has discovered a way to communicate through the dark, to transcend immense distances
1989 • Astronomy
"You might have thought, as I did then, that our species would be on Mars before the century was over"
1989 • Astronomy
Carl Sagan talks about our future and the exploration of space
1989 • Astronomy
"That's home. That's us. On it, everyone you ever heard of, every human being who ever lived.."
1990 • Astronomy
Scientists using the Hubble Telescope study vivid images from 12 billion and more light years away and observe that many galaxies cluster together like -- soap bubbles! Analyzing factors like dark matter and gravitational lensing, how can astronomers confirm this amazing bubble structure?
16 • Cosmic Front • 2014 • Astronomy
Today Phil explains how telescopes work and offers up some astronomical shopping advice.
#6 • Crash Course Astronomy • Astronomy
Dark matter is the biggest mystery of the cosmos. Scientists know that it has been vital to the universe since its birth, and new discoveries reveal that it could create black holes, cause mass extinctions, and might even shape life on Earth itself.
S5E8 • How the Universe Works • 2017 • Astronomy
The discovery of extraterrestrial life might face an impossible challenge: the physics of the universe itself; but using cutting-edge tech, experts might be on the verge of a groundbreaking find -- and the evidence could already be in hand
S8E3 • How the Universe Works • 2020 • Astronomy
A scientist figures out how to go to the moon while fighting for his life in a war trench.
8/13 • Cosmos: Possible Worlds • 2020 • Astronomy
Active galaxies pour out lots of energy, due to their central supermassive black holes gobbling down matter. Galaxies tend not to be loners, but instead exist in smaller groups and larger clusters. Our Milky Way is part of the Local Group, and will one day collide with the Andromeda galaxy. Clusters of galaxies also clump together to form superclusters, the largest structures in the Universe. In total, there are hundreds of billions of galaxies in the Universe.
39 • Crash Course Astronomy • 2015 • Astronomy