The formation of the solar system began with the creation of the sun after an exploding supernova caused spherical accumulation of dust particles and gas in a huge swirling cloud called nebula. Planets and other components of the solar system formed in the flat plane of the rotating disc of dust.Know More
The accumulation of dust particles some 4.5 billion years ago triggered a chain reaction. The center of the cloud attracted more dust as its gravitational force soared. The cloud increased its speed of rotation until it flattened into a disc rotating around a dense center. Temperatures at the core rose drastically as the cloud gathered enough energy to set off nuclear reactions. Eventually, the sun formed as hydrogen atoms joined to form helium, discharging huge amounts of energy in forceful eruptions.
The solar system formed two main groups of planets: the four rocky terrestrial planets closest to the sun and the four gaseous jovian planets farthest from the sun. The gaseous planets condensed at lower temperatures, hence their distance from the hot core of the solar system. The rocky and denser metallic materials formed the terrestrial planets because of their ability to condense at higher temperatures closer to the sun.Learn More
As of 2014, over 3,700 man-made satellites orbit around the Earth. However, only approximately 1,100 of these are currently active. The rest are defunct or temporarily inactive.Full Answer >
The average distance from the Earth to the moon, 238,855 miles, is over 110 times greater than the moon's diameter of 2,159.2 miles. The moon completes its orbit around the Earth in 27 Earth days.Full Answer >
A cloud in space that is composed of dust and gas is call a nebula. The word "nebula" is derived from the Latin word for "cloud," and nebulae in space are indeed large interstellar clouds made up of dust, hydrogen, helium and plasma.Full Answer >
Stars on the main sequence that are the same size as the Sun begin as yellow stars and turn into red giants as their hydrogen fuel runs out. Other stars shrink or explode, depending on their size.Full Answer >