Topic: galaxies

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The Hubble Space Telescope Reflects the Cosmos

"When the Hubble Space Telescope was launched from the Space Shuttle Discovery in 1990, NASA called it the greatest advance in astronomy since Galileo. Instead, within days it became a laughing stock. Hubble had an ei...

How Many Stars Are There? – It’s Okay to Be Smart

How many stars can our eyes see on a dark night? How many stars can we see with something even more powerful than our eyes? How many stars exist?? And how are grains of sand a part of this?! Joe Hanson and PBS Digital...

The largest, sharpest image ever taken of the Andromeda Galaxy

Thanks to the NASA/ESA Hubble Space Telescope, enjoy this "fly through" of the largest and most detailed image ever taken of the Andromeda galaxy. This 4K video by YouTuber Daveachuk explores just one third of the...

How do we study the stars & measure extreme distances in space?

How can we know so much about other galaxies? What are they made of? How big are they? How far away are they from Earth? "Want to know the secrets of the universe? Just follow the light." These two TED Eds fro...

Solar System, Milky Way, Laniakea: Our home supercluster

Our home planet, Earth, circles the sun. The sun, our star, is but one of billions of stars in the Milky Way, our home galaxy... and beyond that? Where on the map of the cosmos is the Milky Way? For the first time, we...

The Hubble Ultra Deep Field in 3D

In 1996, and again in 2004, astronomers pointed the Hubble Telescope at what seemed to be completely empty patches of sky — no planets, stars, or galaxies that we could see. What would w...

The Large and Small Magellanic Clouds

Via kqedscience, this is a tour of two of our closest galaxies: the Large and Small Magellanic Clouds. They are between 163,000 and 200,000 light-years away and hold a few hundred million sta...

NASA: Computer Model Shows a Disk Galaxy’s Life History

This cosmological simulation follows the development of a single disk galaxy over about 13.5 billion years, from shortly after the Big Bang to the present time. Colors indicate old stars (r...

Royal Observatory, Greenwich: How do we measure the universe?

From the Royal Observatory, Greenwich, Measuring the Universe! So how exactly do we measure things that are incredibly far away? Positioning over time, light, and math, math, math! This video contains a lot of informa...

Alien Matter in the Solar System

“Alien matter" detected by a NASA spacecraft orbiting Earth shows that the chemical make-up of our solar system differs from that of the surrounding galaxy. 

The Bolshoi Simulation (2011)

The Bolshoi Simulation is the most accurate large-scale visualization/ simulation of the universe that exists (2011). It’s mapped everything that we know of, and a lot of what we don’...