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.
Showing 24 posts tagged stars
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.
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.
via Boing Boing.
Watch more made-for-kids videos.
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.