galaxies

Showing 6 posts tagged galaxies

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 we find when we looked farther into the universe than we ever had before? 

From Deep Astronomy, The Hubble Ultra Deep Field in 3D, via colchrishadfield:

The least-known parts of our universe, made compellingly visible through human ingenuity; 4 minutes well-spent.

Related viewing: Measuring the Universe and The Most Astounding Fact - Neil deGrasse Tyson.

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 stars like our sun. HD full screen.

These images are from astronomers at NASA’s Goddard Space Flight Center and Pennsylvania State University, who used NASA’s Swift Ultraviolet/Optical satellite telescope to create the highest resolution, wide field surveys in ultraviolet light.

Read more information in the video’s About section, or watch The Beauty of Space Photography, or watch more videos about stars and galaxies.

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 (red), young stars (white and bright blue) and the distribution of gas density (pale blue); the view is 300,000 light-years across. The simulation ran on the Pleiades supercomputer at NASA’s Ames Research Center in Moffett Field, Calif., and required about 1 million CPU hours. It assumes a universe dominated by dark energy and dark matter.

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 information — even about sound waves and color shifts in light — but it’s such a great start to understanding how we see and measure what’s out beyond our Earth and our galaxy. And it demonstrates how important math and patience are in science!

via The Awesomer.