Universe

How was the moon formed?

According to a theory called condensation theory it is believed that the earth was formed 4.5 billion years back from the nebula, a cloud which contains gas and dust particles. It is commonly believed that the moon and earth both are made from this cloud […]

Why does the moon turn red?

Usually red color of moon is seen during an eclipse. The reason behind this is exactly the same that why sun appears red during sunrise and sunset. Sun always shines, when there is night in one part of the earth the other part is having […]

How was the universe created?

The most common and acceptable theory about the creation of universe is “the big bang theory” which suggests that there was a very small point of light having unimaginable density and heat energy which exploded spontaneously nearly 15 billion years ago just before the beginning […]

How many stars are there in universe?

Sky looks so beautiful in the night with the twinkling stars but have you ever tried to count these stars. This question is really challenging for philosophers, scientists, astronomers, dreamers etc. These stars present in the space are not randomly scattered but they occur together […]

What are shooting stars?

Millions of small rock clumps are present in the space which can vary in size. It can have the size of a grain or the size of a golf ball and is made up of dust. During the earth’s revolution around the sun these small […]

How big are galaxies?

There are around 10 raise to the power 71, atoms and around 10 raise to the power 81, invisible mass forming dark matter in an average galaxy. Galaxies are found in large structures known as superclusters, which themselves are massive filaments with immense voids in […]

Why does moon change shape?

Half of the moon is always lit by sunlight because it completes one revolution and rotation around its axis in 29.5 days and the other half is in darkness. We are able to see only that part of moon which is receiving sunlight and during […]

Why does the moon have craters?

There are many craters on the moon which are formed when something smashes on the surface and causes a dent. These craters are formed mainly because of the collision of asteroids, meteorites with the moon. They strike on surface with different speeds but the average […]

How did the Solar System form?

Sun with its eight planets, including our planet Earth forms the Solar System. Most people are taught at school about the sun, the eight planets and their characteristics. Scientists suggest that the formation of the Milky Way, and the formation of the Solar System are […]