Heavenly bodies in astronomy are natural bodies visible in the sky. These are also known as celestial bodies. These bodies do not include man-made objects, such as satellites. Examples of heavenly or celestial bodies include planets, stars, dwarf planets and quasars.Know More
The term astronomical object is also used to define naturally occurring physical entities that are observable in the universe. These objects are typically single cohesive structures such as asteroids, moons, planets and stars. Astronomical, heavenly or celestial bodies differ from astronomical objects. Astronomical objects are associated with a position in space, but these objects may not be a single cohesive structure, such as a star. They are often a grouping of many objects, such as a star cluster, nebula or galaxy. A comet can be defined as both an object and a body. It can be described as a body when referring to its nucleus alone or as an object when referring to its nucleus and tail.
The observable universe can be seen as having a hierarchical structure. The fundamental component of assembly at large scales is the galaxy. Galaxies are grouped into clusters and superclusters. These structures are spread out over thousands, millions or even billions of light years.Learn more about Stellar Astronomy
If you live in the northern hemisphere, the brightest star in the South eastern sky is Siruis. This star is visible in the South, South eastern, and South western sky depending on what time of day it is.Full Answer >
Astronomers estimate that the Milky Way has about 100 billion stars. However, this number is a very rough estimate based on mathematical formula, and advances in technology allow more accurate assessments.Full Answer >
The most distant star ever observed is any contained in Galaxy MACS0647-JD, located 13.3 billion light years from earth. This galaxy is located at such a great distance that even with the aid of powerful orbital telescopes, it is not yet possible to make out individual stars.Full Answer >
Sirius, commonly referred to as the "dog star" is said to be twice as massive as the sun, with a diameter of 1.5 million miles. Its comparatively tiny companion star, called Sirius B, is only 98 percent of the sun's mass, with a diameter of 7,500 miles.Full Answer >