made its way to the red planet to study what might have happened to its atmosphere. Scientists hoped MAVEN would shed more light on Mars' wet past and if life in any form has ever existed on the planet. But what did they find?
galaxies themselves that are expanding but the space between them. What is happening is analogous to inflating a balloon with small coins attached to its surface. The coins behave like galaxies: although they do not expand, the space between them does. Before the galaxies formed, matter that ...
1. How fast are stars orbit speed in elliptical galaxies (from and to) 2. How big differences are there typical between Perigalacticon and...
The disc continues to rotate faster, draw more gas and dust inward, and heat up. After about a million years or so, a small, hot (1500 degrees Kelvin), dense core forms in the disc's center called a protostar. As gas and dust continue to fall inward in the disc, they give up ene...
(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 boasted galaxies other than the...
How do we get such beautiful, ornate, and symmetrical shapes of galaxies — pinwheels, ovals, spirals, and central bars — when the same gravitational forces are at work as those that affect Earth and the Sun’s other planets? The gravitational force of moving stars and rotation control ...
galaxies themselves that are expanding but the space between them.What is happening is analogous to inflating a balloon with small coins attached to its surface.The coins behave like galaxies: although they do not expand, the space between them does.Before the galaxies formed, matter that they ...
The parallax method, however, is only the first rung on the cosmic distance ladder, a succession of methods that astronomers use to estimate distances of objects in the universe. At some point, stars andgalaxiesget too distant to have their parallax measured even by the most sensitive of avail...
Compared to photographing deep-sky objects, like galaxies and nebulae like I normally do,photographing planetsis a breath of fresh air. I am not a planetary imaging expert by any means, but I will share the simple steps I used to get results like the one below. The process involves recordi...
The Schwarzschild black hole is the simplest black hole, in which the core does not rotate. This type of black hole only has a singularity and an event horizon. The Kerr black hole, which is probably the most common form in nature, rotates because the star from which it was formed was ...