Mystery of the Stars

How are stars formed?

恒星是如何形成的？

별은 어떻게 형성되나요?

• Stars are formed from volcanic eruptions on planets

  恒星是由行星上的火山喷发形成的

• Stars are formed from collapsing clouds of gas and dust in space, which eventually ignite nuclear fusion to become a star.

  恒星是由太空中气体和尘埃云塌陷形成的，最终引发核聚变成为恒星。

• Stars are generated from underwater explosions

  恒星是由水下爆炸产生的

• Stars are created by aliens as a power source

  恒星是外星人创造的作为能量来源

What is a star?

• Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements.

  A ball that keep burning!

• A star is like a planet revolving the earth. It depends on the sun to reflect light. It cannot produce light on its own!

Will stars ever burn out?

星星会燃烧完并消灭吗？

• No. The stars will be at the same place in the universe forever.

• The stars will burn out every day. New stars are form every day.

• These stars have lifetimes between 50 million and 20 billion years.

Will stars move in the universe?

• Stars is static. It will never move!

• All stars move in space.

• Stars do not move but rotate at its axis

If you are traveling form the earth, how long will you take to reach a star by rocket?

• Around 100,000 years

• 2 weeks.

• 1 year.

• 6 months

If the surface of the sun is 5600 'C. What do you think the temperature of the stars are?

• from 2,226 to 49,726 degrees in Celsius. Red is the coldest stars. Blue is the hottest.

• All stars are cooler than the sun.

• Stars are not hot. So the temperature is less than 100'C

What is the color of the stars?

• All white

• The colors of the stars indicate their surface temperatures. There are five star colors: blue, white, yellow, orange, and red.

How do astronomers study stars that are light-years away from Earth?

• By listening to the star's heartbeat

• By using telescopes to observe the light emitted by the stars and analyzing the light spectrum.

• By sending messages through the stars

What role do gravity and nuclear fusion play in the life of a star?

• Gravity has no impact on the star, while nuclear fusion is the only force at play.

• Gravity forms the star, while nuclear fusion powers the star.

• Gravity destroys the star, while nuclear fusion creates the star.

• Gravity and nuclear fusion work independently in the star.

When the earth rotates, it seem like stars move across the sky. What is a group of stars that seem static from the same location?

• The north star.

• The brightest star near the earth.

• The stars at the equator.