Some unknown facts about stars in the sky

 1) What are the stars in the sky?

A:- A star is a ball of gaseous matter. This heat is so great that the gas inside the star burns and makes the star appear bright.

2) What is the temperature of stars?

A:- Stars range in temperature from 2,100 degrees Celsius to about 50,000 degrees Celsius.

3) How do you know how bright a star is?

A:- The color of the star is the indicator of its warmth. White stars are hotter than red stars. And
stars that are brighter than these appear bluish.

4) What is the nebula?

Ans:- Huge cloud of dust and gas which is formed by condensation is called nebula. Like vaporized
gaseous grains these nebulae are actually the births of stars.

5) What gas is there in the stars of the sky?

A:- Stars are mainly masses of hydrogen and helium gas.

6) Where does the heat and light of stars originate?

A:- Like hydrogen bombs, nuclear reactions in the cores of stars produce heat and light.

7) What is the temperature at the center of stars?

Ans:- The core temperature of stars is about 1.6 million degree centigrade. A grain of sand heated to this temperature can kill a person 150 kilometers away.

8) What is the state of all the substances in the hot stars?

Ans:- All the matter in the hot star is in the plasma state i.e. in the state where the electrons are separated from the atoms.

9) Why do we see twinkling stars?

A:- The density of the Earth's atmosphere is constantly changing due to the flow of air. We see
stars twinkling because the light from the stars passes through the Earth's atmosphere.

10) What reaction takes place in the center of stars?

A:- At the center of stars four hydrogen nuclei collide to produce a helium nucleus. This is the nuclear fusion reaction.

11) How is a stars-shaped judged?

A:- Astronomers calculate how big a star is from luminosity and warmth. The size and brightness of a star depends on its mass.

12) What type of star is the sun?

A:- Our sun is a medium sized star. There are no other stars in the universe that are more than 100 times the mass of the Sun or less than 6-7 percent of the Sun's mass.

13) What is the temperature of a blue star?

A:- Supergiant blue star that Papis- its surface temperature is about 40,00 degree centigrade.

Life cycle of a stars :-

1) Gases and dust collect.

2) From a hot core and created a new stars.

3)Like our sun, shines for 10 billion years. this cools to a red giant.

4) Which leaves a smaller.

5) Hotter white dwarf.

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Mercury Planet Details

 

All information about Mercury

Mercury is the Roman god of Oratory, monsters, and commerce. Mercury planet is named after him. Mercury is the smallest planet in our solar system. It is slightly larger than the Earth's moon. It is the closest planet to the Sun, but it is not actually the warmest planet in the solar system. Venus is the warmest planet in the solar system. Mercury can only be observed from Earth for a short time in the early morning and early evening hours.

Mercury planet is one of the rocky planets along with Venus, Earth and Mars. Mercury has no own atmosphere, and it has no moon. On the surface of the dust-covered Mercury, large holes or "craters" are sometimes seen that look like volcanic eruptions. Craters are believed to have been formed by the impact of a piece of rock falling from space. Mercury planet's surface is wrinkled by long, low ridges, which probably formed as the cooled and shrunk. The largest of Mercury's craters is called the Caloris Basin, which is 1,550 km wide and 2 km deep.

This small planet revolves slowly compared to Earth, so one day here lasts a long time. Mercury takes 59 days to complete its orbit, which Earth takes 24 hours. Mercury orbiting the Sun once takes 88 days, which Earth takes 365 days. If you lived on Mercury, you would have a birthday every three months.

A day on Mercury is not like a day on Earth. The sun rises and sets on the earth every day. Since the rotation of Mercury is extremely slow and has a short year, it takes a long time for the sun to rise and set there. On Mercury, the sun rises only once every 180 days.

The planet Mercury has an extreme, night temperature of -183 ° C (approximately) and again 425 ° C (approximately) during the day. Also, to protect it from the harmful radiation of the sun, there is no permanent protective armor around the planet.

Mercury has been visited by two spacecraft: Mariner 10 and Messenger.

Mercury Planet Data:-

The diameter of the planet Mercury: 4,878 Kilometers.

Mercury has an average distance of 58 million kilometers (36 million miles) from the Sun.

Mercury is 0.4 astronomical unit away from the Sun.

Mercury orbits the Sun once every 88 days.

Mercury orbiting once on its own axis has a speed of 58 days 15 hours 30 minutes

Mercury has a temperature of +167° Celsius (333° Fahrenheit).

Mercury Planet at a glance: -

Structure and surface: -

Mercury is the smallest planet in our solar system.

Mercury is a terrestrial planet. It is small and rocky.

Mercury actually has no own atmosphere.

Mercury time: -

One day of Mercury is equal to 59 days of Earth.

One year on Mercury is equal to 88 days on Earth.

Neighbor of Mercury: -

Mercury has no satellites.

Mercury is the closest planet to the Sun.

Venus is the neighboring planet of Mercury.

History: -

Mercury has been known since ancient times because it can be seen without advanced telescopes.

Mercury planet has been visited by two spacecraft: Mariner 10 and Messenger.

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