The lights from heaven......
This site will help you to understand some mysterious facts about our mysterious universe.
You can also see beautiful images of stars, nebulaes and the planets of our solar system by clicking on 'Images' ....
Universe is the collection of all the celestial objects located in the expanses of space and, of course, what lies between them. The universe includes the galaxies and their stars, planets, moons, comets, asteroids, meteors, nebulae, and black holes.
Some useful terminologies :
Astronomical Unit: The average distance of Earth from the sun. This unit is useful for measuring planetary distances. The exact value of 1 AU is 149.6 million kilometers. For practical purposes, this figure is usually rounded off to 150 million kilometers.
Light-Year: A unit of measure used to express the distances between objects outside the solar system, such as stars and galaxies. One light-year is the distance that light travels in one year, that is, 5.87 trillion miles (9.46 trillion kilometers).
Stars: Stars are distant suns. Like our sun, they emit enormous amounts of energy generated by the nuclear reactions occurring within their core. The color and intensity of the light varies from star to star, as do their size and temperature. However, despite the differences, we can identify several properties common to all the stars in the galaxy.
Galaxies: Galaxies, like our Milky Way, are "star cities" - areas in the universe in which billions of stars, nebulae of gas and dust and other celestial objects exist in relatively close proximity. Between the galaxies is an almost perfect vacuum, with no stars or other celestial bodies. Every galaxy contains hundreds of billions of stars.
Nebulae: Nebulae are gigantic clouds of interstellar dust and gas found within a galaxy. Some nebulae are remnants of stars that exploded in the past, while others are a "nursery" in which new stars form. From Earth, nebulae look like fuzzy spots of light to the naked eye. However, advanced, high-powered telescopes can reveal their amazing beauty.
Pulsar: A star that is the remains of a supernova and emits radio waves. Radio waves picked up by radio telescopes suggest that pulsars continually emit thousands of radio pulses per minute at a constant rate.
Binary Star: A system of two stars that orbit each other. Sirius, the brightest star of the winter sky in the Northern Hemisphere, is an example of a binary star. One of its stars is large and bright, but the other can be seen only through a powerful telescope.
Black hole : A region of space time, from which, nothing, not even light can escape. We cannot see black hole, because light cannot escape from it, but by indirect evidences of it, we can know the existance of black hole.
Quasars : A star like object which has large red-shift and emits powerful blue light and often radio-waves.