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Stars: Classification of Stars and how they categorize.

At first, glance stars pretty much all look alike. Twinkling dots scattered across the sky. When we look closely we see the difference. Some look brighter and some look dull, sometimes that due to them being at different distances but it’s also true that stars emit a different amount of light too. If we look through Binoculars or take pictures of them, we'll see that they're all different colors, too. Some looks white and some looks red, orange. A spectrum is a result when we divide the incoming light from an object into individual colors or wavelengths. This reveals the vast amount of physical data about the object. But in the late 1800s we were only starting to figure out, Interpreting stellar spectra was a tough problem. The spectra we measure from the star are a combination of two different kinds of spectra. Stars are hot, dense balls of gas, so they give off a continuous spectrum; that is they emit light of all wavelengths. However, stars also have an atmosph...
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Hawking Radiation

Hawking's Radiation Black holes: What is Blackhole?, What we know about black holes? How they work?, Is there is any black hole in our Universe. All these questions annoying physicist for the last 5 decades. We all know that Event horizon is Point of no return in black holes. In Actual, Event horizon is a boundary of black hole outside the event horizon an object can pass unless it faces the gravitational pull from the black hole, but if an object crosses the boundary of event horizon then it becomes impossible for an object to escapes from its strong gravitational pull, Even light cannot be able to escape from its strong gravitational pull. Normally, when we are talking about strong gravitational pull actually we're talking about the boundary of the Event horizon. Stephan Hawkings first discovered that light rays which enter event horizon and light rays which are outside the event horizon doesn't approach each other. It means that the area of even...
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Top 10 Scary Astronaut Stories

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