The biggest stars in the universe are called red supergiants. To get a picture of how huge these stars are, just imagine being able to fit 1800 suns into one red supergiant or imagine the sun growing so much that it already reaches the orbit of Saturn. But their superiority in size does not mean that these are stars have the most mass. In fact this stage in the life of a star occurs when a star such as the [...]

When you look at stars in the night sky, it appears like they are just tiny dots of light that look the same. However, they are millions of lights years away, stars look very different from how they appear at night. They are in fact classified into several types according to their size, temperature, and brightness.

Thanks to Viktor Ambartsumian, a Soviet physicist, who proposed the existence of a protostar. Because of that much is known today about how stars are formed, dispelling unfounded beliefs of their origin.

Organization in science is a must. When trying to classify, scientists call this the study of classification or taxonomy. Well, in terms of astronomy, there is also organization. And one of these classifications is called the spectral class. Spectral class or spectral classification is the manner of organization in astronomy that deals with classifying stars according to brightness or luminosity, or through the spectrum or color of the star’s chromospheres.

A planetary nebula is not a planet, although its name often gives that initial impression. It is actually the accumulation of gas and plasma given off by a star that is about to bade farewell to the universe. They are so named because their appearance through a small optical telescope closely resembles a giant planet. The man who coined the name, William Herschel,

In astronomy, the term protoplanetary disk refers to the circumstellar disk of space matter, composing of space dust, different types of gas, specifically the types of nitrogen, hydrogen or other elemental gas. It is said that this type of astronomical marvel is the basis or essential structure for forming planetary systems, and eventually galaxies.

From the name, a reflection nebula is an interstellar cloud of dust particles that reflect light from a nearby star. This means that as opposed to an emission nebula that gives off various colors, a reflection nebula is unable to give off its own light, but has to rely solely on the light given off by a nearby source, typically a star.

The Sun, Moon, stars and other celestial objects are beyond the reach of any instrument that can be used by observers here on Earth. Measuring the distance of a celestial object from the Earth might seem to be complicated. But measuring the distance of these remote entities have been simplified by the concept of parallax.

There are many terms in astronomy, and there is no doubt about that. One of which is the concept of Obliquity, more commonly known as the axial tilt. The angle between a certain rotational axis of an object and the specific perpendicular line in regards to the object’s orbital plane is better known as its obliquity.

A group of up to a thousand young stars that were produced from one giant molecular cloud held together by joint gravitation is better known as an Open cluster. It is found in irregular and spiral galaxies where there is active star formation. It is sometimes referred to as Galactic clusters, because they are almost absolutely found in the galactic plane of the Milky Way.