On Earth and in the Universe, size matters, but it matters in different ways. In Space, bigger is not necessarily better.
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It's hard to get to space.But there is a concept that might make it possible: the space elevator. How exactly does it work.
In a Nutshell • 2016 • Astronomy
66 million years ago, an asteroid slammed into Mexico’s Yucata´n Peninsula, causing a dinosaur mass extinction. With over 700,000 asteroids in space, what's in store for humanity and our planet if it happens again?
Breakthrough • 2019 • Astronomy
In 2037, a devastating tragedy in the colony forces everyone to question the mission. In the present, SpaceX attempts another pioneering launch.
This is the story of how our solar system will be transformed by the aging sun before coming to a spectacular end in about eight billion years. Astronomers can peer into the far future to predict how it will happen by analysing distant galaxies, stars and even planets in their final moments. In this film, Horizon brings these predictions to life in a peaceful midwestern town that has a giant scale model of the solar system spread out all over the city. As it ages, the sun will bloat into a red giant star, swallowing planets... as well as half the town. The fate of the Earth itself hangs in the balance. How will the solar system end?
Planets that orbit two suns instead of one might be deadly hell worlds, but new discoveries reveal that sci-fi star systems with binary stars might be optimal places for alien life.
S6E2 • How the Universe Works • 2018 • Astronomy
Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them binary stars. Many stars are actually part of binary or multiple systems. If they are close enough together they can actually touch other, merging into one peanut-shaped star. In some close binaries matter can flow from one star to the other, changing the way it ages. If one star is a white dwarf, this can cause periodic explosions, and possibly even lead to blowing up the entire star.
34 • Crash Course Astronomy • 2015 • Astronomy