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
The stars appear to move from east to west across the night sky because as Earth rotates, the sky is observed as rotating, according to Astronomy Education at the University of Nebraska–Lincoln. Observers on Earth, in both the northern and southern hemispheres, see objects in the sky move counter-clockwise.Full Answer >
Aside from the moon, a whole multitude of stars, planets, comets and even man-made satellites can be seen with the naked eye on a clear night. With the help of some binoculars or a small telescope, the moons of Jupiter and even spectacular lunar craters can be admired.Full Answer >
The shape of our galaxy, the Milky Way, is a spiral. A bulge of older stars exists at the center of the spiral and the arms of the spiral contain newer stars. A black hole possibly exists in the very center of the Milky Way.Full Answer >
Stars are mostly made up of hydrogen and helium, with only trace amounts of heavier elements. A star is a massive incandescent ball of plasma held together by its own gravity. The principle process that occurs within a star is the conversion of hydrogen into helium.Full Answer >