The brightest star visible from Earth is Sirius, located in the Canis Major constellation. There are many very bright stars in the night sky that are visible from Earth, and as the moon makes its orbit it does pass near or in front of several of these.
The brightness of stars viewable from Earth is measured using a scale known as "magnitude." Given that stars can be at an infinite number of different distances from the Earth, their magnitudes are usually charted as both their apparent brightness and their absolute brightness. Apparent magnitude refers to the observable light as seen from Earth. Absolute magnitude is a measurement based on a standard distanceLearn More
Betelgeuse is 4,000 degrees Fahrenheit cooler than the sun, measuring an effective temperature of 6,000 degrees Fahrenheit compared to the sun's 10,000 degrees Fahrenheit. Despite its lower temperature, Betelgeuse's diameter of 600 million miles is around 700 times the diameter of the sun.Full Answer >
The Oxford Dictionary says a star is a massive ball of gas, primarily helium and hydrogen, compressed by its own gravity to the point that spontaneous nuclear reactions are triggered, causing it to emanate heat, light and other forms of energy. The sun is the closest star to the Earth. All other stars are so distant from the solar system they only appear as tiny points of light.Full Answer >
The largest identified star in the known universe is VY Canis Majoris, a hypergiant of the constellation Canis Major, calculated to be more than 1,540 times larger than the sun. YV Canis Majoris is situated 5,000 light years away from earth and is probably far from the largest star in the galaxy.Full Answer >
While the sun is a star, not all stars are considered suns. In order to be classified as a sun, any given star must have planets orbiting around it, and not all stars do. However, the sun is not the only star that has planets orbiting it.Full Answer >