Chapter 20: Stars

Did you know?//Random facts bookWords: 5785

(Image above from google)

1. The nearest star to Earth is the Sun.

2. Every star you see in the night sky is bigger and brighter than our sun.

3. You can't see millions of stars on a dark night. Despite what you may hear in TV commercials, poems and songs, you cannot see a million stars ... anywhere. There simply are not enough close enough and bright enough. On a really exceptional night, with no Moon and far from any source of lights, a person with very good eyesight may be able to see 2000-2500 stars at any one time.

4. Stars are black bodies. A black body is an object that absorbs 100 percent of all electromagnetic radiation (that is, light, radio waves and so on) that falls on it.

5. Our sun is a dwarf star.

6. Stars don't twinkle. Stars appear to twinkle ("scintillate"), especially when they are near the horizon. One star, Sirius, twinkles, sparkles and flashes so much some times that people actually report it as a UFO. But in fact, the twinkling is not a property of the stars, but of Earth's turbulent atmosphere.

7. You can see 20 quadrillion miles, at least. On a good night, you can see about 19,000,000,000,000,000 miles, easily. That's 19 quadrillion miles, the approximate distance to the bright star Deneb in Cygnus.

8. There are approximately 200-400 billion stars in our Milky Way Galaxy alone.

9. Stars are usually between 1 and 10 billion years old. Some stars may even be close to the age of the observed Universe at nearly 13.8 billion years old.

10. The sun is in fact a middle aged star. It was born about 5 billion years ago, and will die in approximately 6 billion years. Yes, you read that correctly: the sun will die. In 3.5 billion years time the sun, it is believed, will shine 40% brighter than it does right now.

11. One in four Americans believe that the sun orbits the Earth, rather than the other way around.

12. The sun constitutes 99% of the total mass of our solar system.

13. A nebula that has only 6% less the mass of our sun cannot become a star; it will instead become a planet.

14. Stars are deeply romantic for human beings and serve as a perennial symbol of progress and self-transcendence, as in the advice to "reach for the stars."

15. When you look up at the night sky with the naked eye, every star you see is part of our own Milky Way Galaxy.

16. Most of the stars in the Milky Way lie in approximately the same plane, meaning that our galaxy is basically a flat disc, 100,000 light years across.

17. All stars are made of the same basic ingredients: hydrogen and helium.

18. The gas cloud surrounding the stars in the constellation Aquila contains enough alcohol to make 400 trillion pints of beer.

19. Some of the oldest stars in the universe have gradually drifted to gather around our Milky Way Galaxy.

20. Three out of every five solar systems in the universe have two stars at their center instead of one.

21. A star is considered to be dying once its energy production starts slowing, although it usually takes around 4 billion years for a star to be entirely cooled down.

22. The earliest known person to suggest that the Earth was actually a planet rotating around a star was Aristarchus of Samos. His ancient Greek contemporaries ridiculed his "outlandish" ideas.

23. It takes so long for a star to die that astronomers have not yet observed a fully dead star.

24. Of the 50 brightest stars visible from Earth, the least bright is Alpha Centauri.

25. when it comes to stars, blue is hotter than red. We commonly associate the color red with heat, and the color blue with cold. However, this is not true for stars.

26. Like all other organic beings, stars are born and pass through several stages of life before finally dying. Before it dies, a massive star will go through a chain reaction known as a supernova, which is a type of explosion.

27. If you have ever wanted to be able to look back and get a glimpse of the past, then you need only lift your eyes to the night sky. That's because the light from stars takes millions of years to reach Earth. When you look at a star, you are seeing what it looked like thousands upon thousands of years ago. Therefore, looking at the stars in the night sky is literally looking back in time.

28. Although all stars appear to be individual stars in the sky, many stars actually exist in pairs. These stars are known as binary stars. A binary star consists of two stars orbiting a common centre of gravity.

29. Throughout human history, stars have had very important roles to play. Stars formed an important part of religious practices. They have been grouped into constellations and used in astrology in the form of star signs. The design of calendars was also informed by stars.

30. The estimate that's out there is 200,000,000,000,000,000,000,000 stars. That's a septillion – and even astronomers are just guessing. There could be more.

31. One of the biggest stars is Eta Carinae and this is actually 2 massive stars, which is located about 8,000 light years from Earth.

32. The bigger the star, the shorter its life.The smaller stars might survive for hundreds of billions of years.

33. Farthest galaxies ever observed are 10 billion light years away.

34. A shooting star is not a star. It's rock or dust, moving so fast that it heats up when it reaches the Earth's atmosphere.

35. The sun looks yellow to us here on earth, but in space, its actually white.

36. The Southern Cross is the smallest (in area) of all the constellations. It is also known as Crux.

37. Sirius, the brightest star in the sky is 20 times brighter than the sun.

Im so sorry this chapter was late I was really busy yesterday so I made this chapter longer than the others. In fact this is my longest chapter because 1048 it is words long.

See you in the next chapter!

Baiiiiiiiiiiiiiii