Stargazers Unite
brightness_2Ask and Learn About the Cosmos
Galaxies are massive systems of stars, gas, and dark matter that are held together by gravity. They come in various shapes and sizes, and are... Read more
The largest type of star by diameter is the red supergiant. These stars are massive and have a diameter of over 1,000 times that of the Sun. One... Read more
Planetary nebulae and HII regions are two types of nebulae found in space. Planetary nebulae are formed by the ejected outer layers of dying low to... Read more
Black holes and neutron stars are both astronomical objects that are formed from the collapse of massive stars, but they have some fundamental... Read more
Planetary nebulae and HII regions are two types of nebulae found in space. Planetary nebulae are formed by the ejected outer layers of dying low to... Read more
The Milky Way is a barred spiral galaxy that is part of the Local Group, a collection of more than 50 galaxies that are gravitationally bound to each... Read more
Galaxies come in different shapes and sizes, but they are generally classified into three main types: elliptical, spiral, and irregular. Irregular... Read more
A waxing moon is the period when the moon is moving from a new moon towards a full moon. During this phase, the visible portion of the moon... Read more
The sun is a main sequence star, which means that it is in a stable phase of its evolution. However, as it continues to burn hydrogen in its core, it... Read more
A double star, also known as a binary star, is a system of two stars that orbit around a common center of mass. Double stars can be classified into... Read more