Some Known facts into New facts - The sun - Planets - International space station

 Some Known facts into New facts

The universe is always expanding, and every time the universe grows larger and larger.

People were able to see the sun, moon, and stars but could not understand about the whole galaxy. The invention of the telescope created a revolution in astronomy. Scientists measure the size of the universe by what they can see and understand. This measurement is called an Observable universe which is around 93 billion light years.

Scientists thought that the beginning of the universe with the start of an explosion called the Big Bang. Big Bang theory explains the whole universe. The universe mostly consists of dark matter and dark energy. Around 27 % of the universe is made up of dark matter; dark energy fills all space. Dark energy is a theory around 68% of the universe is dark energy which is used to find the universe expanding.

The sun

The solar system is mainly working with the sun. We know all planets revolve around the sun. The nuclear fusion process occurs in the sun which releases enormous amounts of energy as light and heat. The sun consists of hydrogen atoms that combine or fuse together to form helium under enormous pressure.

Planets

We know that planets revolve around the sun; the first four planets are relatively close together and close to the sun. Usually, the first four solar planets, Mercury, Venus, Earth, and Mars are called inner planets. The other four larger planets, Jupiter, Saturn, Uranus, and Neptune are called outer planets.

        Mercury is very hot during day time but very cold at night time. Mercury's one day is equal to Earth's 58.65 days. Mercury revolves around the sun is very fast compared with other planets. Venus is a very bright and hottest in our solar system. Venus is a different planet in our solar system because Venus spins in the opposite direction to all other planets. We know that in our solar system, earth only living planet. 

Mars is a reddish planet because of which it appears slightly red. If a storm arises on Mars is not easily stopped. Most space research is focused on Mars planet because scientists think that human beings can live on Mars. In recent the biggest sound frequency has been observed by Insight spacecraft. 

Jupiter is a giant planet that more than reflects the sun's rays. Yes, Jupiter's reflection of sunlight is larger than other planets. Saturn's planet is bright which is the second biggest and gaseous planet. In recent its rings slightly disappeared. Uranus is a cold gas planet. 

This planet has a peculiar tilt, longest summers and winters each lasting 42 years. Neptune appears in greenish color. In the beginning research, Pluto was the next planet to Neptune but finally, scientists concluded Pluto crosses Neptune’s orbits every 248 years.

International space station

ISS is the largest spacecraft which is called a science laboratory. The main purpose is to provide an international lab for conducting experiments in space. In this spacecraft, there are many other research runs especially in biology, physics, astronomy, and meteorology. It possesses electrical connection, food support, water purification and so and so.