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 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
colour. 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.
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science