If you get the To continue watching press "Allow" just wait a few seconds and close the popup from the "X"

How Big is the Universe?

Category: Astronomy

It is one of the most baffling questions that scientists can ask: how big is the Universe that we live in? Horizon follows the cosmologists who are creating the most ambitious map in history - a map of everything in existence. And it is stranger than anyone had imagined - a Universe without end that stretches far beyond what the eye can ever see. And, if the latest research proves true, our Universe may just be the start of something even bigger. Much bigger.

You might also like

Brown Dwarfs

While Jupiter is nowhere near massive enough to initiate fusion in its core, there are even more massive objects out there that fall just short of that achievement as well called brown dwarfs. Brown dwarfs, have a mass that places them between giant planets and small stars. They were only recently discovered in the 1990’s, but thousands are now known. More massive ones can fuse deuterium, and even lithium, but not hydrogen, distinguishing them from “normal” stars. Sort of.

28Crash Course Astronomy • 2015 • Astronomy

A Grand Tour

Starting with a grand tour of the Solar System, powerfully told by the world’s top space scientists. From the raging inferno of the Sun to the icy beauty of Pluto, discover the secrets that the planets have kept for billions of years, revealed with stunning images from space.

1/8Secrets of the Solar System • 2020 • Astronomy

When Supernovas Strike

Supernovas are the violent death of giant stars, and new discoveries reveal that these cataclysmic events create the elements that are essential to all life in the universe.

S7E2How the Universe Works • 2019 • Astronomy

Cassini: The Grand Finale

Twenty years after its launch, we bid farewell to the Cassini spacecraft as it plunges into Saturn’s atmosphere in a planned death spiral. Productive right to the end, Cassini has rewritten the textbook on not only Saturn and its moons, but our whole solar system as well.

1Science Breakthroughs • 2017 • Astronomy

Life Looks for Life

It's our fate to live in the dark...

2/10The Sagan Series • 1989 • Astronomy

The End of the Solar System

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?

Horizon • 2016 • Astronomy