How old is the Sun? What will happen when the Sun turns into a nebula?
The Sun will not turn into a nebula. But, the Sun was formed from a nebula over 4 billion years ago. A nebula is a cloud of dust and gas (often called "gust"). If enough of this dust and gas come together, a star can form inside a nebula.
The Sun seems very old. But it is only halfway through its life. In a very long time, the Sun will come to the end of its life. It will begin to change then.
The Sun will get much bigger. It will be a red giant star. The Sun will be so big that it will cover Mercury and Venus. The Earth will be too hot for any life to stay on the planet. So if humans are around then, they might have to camp out on Pluto for a little while.
At the very end of its life, the Sun is likely blow off some of its layers. It will then shrink a lot, becoming a cooler white dwarf star.
Submitted by Victor (Oregon, USA)
Submitted by Benjamin (Pennsylvania, USA)
(October 9, 1997)
Shop Windows to the Universe Science Store!
Learn about Earth and space science, and have fun while doing it! The games
section of our online store
includes a climate change card game
and the Traveling Nitrogen game
You might also be interested in:
It depends on which type of motion you are asking about. If you take a birds-eye view from the top of the solar system all the planets orbit around the Sun in a counter-clockwise (or direct) direction....more
Have you ever wondered how astronauts live in space? Did you know they do a lot of the same things we do here on Earth? Astronauts eat, exercise and sleep just like we do. However, their food isn't always...more
There is a really neat internet program called Solar System Live that shows where all of the planets and the Sun are. If you go to that page, you'll see an image similar to the one on the left. Below the...more
The picture of the American Flag (the one put there by the Apollo astronauts) is waving (or straight out) in the wind. How could that be possible if there is no atmosphere on the Moon? Was it some sort...more
I was wondering if there is a new planet? Are there planets (a tenth planet?) after Pluto belonging to our solar system? What are the names of the new planets discovered in the solar system? Are there...more
When an object has a really high energy, it can form a black hole. This is called a primordial black hole. Primordial black holes were formed near the beginning of the universe. Primordial black holes...more