ADVERTISEMENT

Why do stars twinkle? 9/28/2015 •

Why do stars twinkle?

Imagine a summer warm night and clear sky covered with thousands of blinking star diamonds. Very romantic and beautiful, but do you know why they actually blink? It happens because the Earthly atmosphere is warmed-up inhomogeneously.


Warm and cold air has different density, that's why the deflection angle of the light is also different when it is going through warm or cold atmospheric layers. Airflows are constantly moving and mixing, thus combination of cold and warm layers being always changed. As a result, a star may seem very changeable – first it may be bright and the next moment obscure. Sometimes it may even seem that a star is twitching. When viewed at high magnification a star may seem to change its shape and color.

Stars twinkle a lot right after the sunset, because a great number of warm airflows rise up into the atmosphere from the earthly surface that is warmed-up during the daytime.

#Science

Your opinion matters
12 Comments
Betty Rader
Betty Rader
Star light, star bright, I wish I may, I wish I might!
4
Sep 27, 2015 11:52PM
Terry E Maxfield
Terry E Maxfield
If so, why don't planets twinkle?
0
Sep 28, 2015 4:47PM
jsnjmoore
They do, if you look at them with the naked eye. For example, Mars looks like a red star and it seems as if it twinkles.
1
Sep 28, 2015 8:22PM
Bill Fultz
Really? All my life I thought the imaginary god was "up there" turning the master light switch on and off to mess with our heads. LOL
1
Sep 28, 2015 9:58PM
Vickie S. Rosker
Vickie S. Rosker
Thanks =)
0
Sep 28, 2015 10:02PM
Stewart Whisman
It is or might not be my knowledge but some stars burn out. I believe those to be planets reaching their end of existance. But I also believe that is where you come up with shooting stars. The ones that burn out I believe explode do to gas and heat coming from within the planet.Now you can check all this out cause heaven knows,I am no astrologer!
0
Sep 28, 2015 11:13PM
Belinda Garza
Belinda Garza
Interesting facts; I always thought STARS twinkle because they are SUNS like our Sun twinkle. Pause (like a heart beat) So thank you!! :)
0
Sep 29, 2015 3:16AM
Tom Young
Twinkle Twinkle little star.....
0
Sep 29, 2015 3:21AM
Martin Weeks
Martin Weeks
They also twincle because the large majority of stars we can see are pulsars, or other types of "flashing" stars. They pulse because they are rotating at a rapid pace and emitting huge amounts of radiation in the form of light.
0
Sep 29, 2015 5:39AM
Buck Burchard
Stewart, it is stars that are exhausting their energy. Not planets. Also planets do not explode. Shooting stars are bits of matter that make up the tails of comets. The earth passes through the debris.
1
Sep 29, 2015 5:52PM

Interesting Facts

Educational video: How to master your sense of smell 1/20/2017 • dawn

There are so many professionals who can distinguish individual odors in a fragrance made of hundreds of scents. However, can an ordinary person develop such an ability? Watch the video about three simple steps to a better nose!

Read more

#Science

A unique Bat bot: a robot that flies like a real bat 2/8/2017 • Dean Braun

Technologies keep surprising us! Researchers from Caltech and the University of Illinois at Urbana-Champaign created an amazing example of biomimicry. A Bat bot is a robot that has silicone wings. Changing shape of the wings during flight the robot looks so natural you wouldn't believe it's a bot! Watch this exciting video and see for yourself.

Read more

#Science

9 little-known facts about Albert Einstein 1/25/2017 • David Wilkes

The greatest genius of his epoch, Albert Einstein is still famous as one of the most talented scientists of all time. He had a remarkable life, full of amazing events and things besides his famous theory of relativity. Today we want to share the most interesting facts about the most recognizable theoretical physicist in history with you.

Read more

#Science #History #Personality

This unbelievable building in Italy can purify the air! 12/7/2016 • Frank Rezentes

If you agree that keeping the environment clean is important, then you'll like the thing that the Italians came up with. They developed a building consisting of eco-friendly materials that can purify the air.

Read more

#Science

Hubble Space Telescope: the most fascinating facts you don't know about 12/10/2016 • wilson

The HST is a huge achievement of mankind. It allows us to learn more about outer space and the furthest galaxies. However, do you know something about the telescope that helped to disclose so many secrets about cosmos?

Read more

#Science