The Wolf-Rayet star WR 124 and its wind nebulae (actually denoted M1-67). The mass of WR 124 is estimated at a moderate 20 solar masses, although this is after it has already lost much of its initial mass to create the wind nebula around it. Credit: ESO. You may have seen one of...
You may have seen one of these astronomical scale picture sequences, where you go from the Earth to Jupiter to the Sun, then the Sun to Sirius – and all the way up to the biggest star we know ofVY Canis Majoris. However, most of the stars at the big end of the scale are at a...
If a googol isn’t big enough for you, there are even bigger numbers out there!One of them is a googolplex, which is a 1 followed by a googol of zeros.The scientific notation for a googolplex is 1 x 1010^100 As massive as a googol is, a googolplex is many, many times larger,such...
What is going on in troposphere?Is the water cycle an aquatic?How does it work?Does it go as fast as the rocky cycle? 答案 .star一般是指恒心 They came from the "big bang" and they far away from each other.The lightest and the most common element is Hydrogen.The others fromed by...
As experts understood more about the beginning of the universe and the Big Bang theory, they realized that galactic collisions were even more common in the early stages of time. Because the universe was much smaller, galaxies were huddled closer together, and, shooting out from the origin of ...
Hubble's Law is a major piece of evidence that the universe is expanding — his work formed the basis of the big bang theory of the origin of the universe. The Doppler Effect Much like the high-pitched sound from a fire-truck siren gets lower as the truck moves away, the movement of...
American astronomerHarlow Shapley(1885–1972) calculated the size of the Milky Way galaxy and general location of its center. He argued that the objects known as "nebulae" lay within the galaxy, rather than outside of it, and incorrectly disagreed with Hubble's observations that the universe bo...
American astronomerHarlow Shapley(1885–1972) calculated the size of the Milky Way galaxy and general location of its center. He argued that the objects known as "nebulae" lay within the galaxy, rather than outside of it, and incorrectly disagreed with Hubble's observations that the universe bo...
Whether you’re using a camera lens or a telescope, learning how to focus your camera for an astrophotography image is one of the first big hurdles to overcome when entering this hobby. In this article, I’ll discuss the methods I use to focus my telescopes and lenses for astrophotography,...
This is the simplest telescope design you could have. A big lens gathers the light and directs it to a focal point and a small lens brings the image to your eye. © 2000 HowStuffWorks A telescope is an amazing device that has the ability to make faraway objects appear...