stars

Showing 24 posts tagged stars

How Do We Know How Old the Sun Is? The Royal Observatory, Greenwich, and animation studio Beakus join together to explain how Kepler and Newton’s laws help us figure out the weight of the sun, how the age of our solar system can be calculated by studying meteorites, and how that data helps us determine the sun’s age.

Previously from the Royal Observatory Greenwich, Measuring the Universe, and more videos about the sun.

Switch this video to HD full screen and marvel at the incredible detail in which we can now observe the sun, our closest star. This video is filled with year four highlights from the Solar Dynamics Laboratory (SDO), and it’s incredible.

Previously, the Solar TErrestrial RElations Observatory (STEREO), and Jewel Box Sun: how SDO converts the wide range of invisible wavelengths into colorized images that our human eyes can see.

via Discover.

How can we know the size, composition, and atmospheric makeup of distant exoplanets? NASA explains the details in this Alien Atmospheres video. 

By observing periodic variations in the parent star’s brightness and color, astronomers can indirectly determine an exoplanet’s distance from its star, its size, and its mass. But to truly understand an exoplanet astronomers must study its atmosphere, and they do so by splitting apart the parent star’s light during a planetary transit. 

Watch more astronomy videos, including Measuring the Universe and The Hubble Ultra Deep Field.

via Boing Boing.

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.