Stars

When we look at stars in the night sky we are looking back in time. Many search for millions if not billions of years ago full stop for the more the star light reaches our eyes left those for a way to start some time ago wrangling from a few minutes ago to 4 years ago (Alpha Centauri, the sun’s nearest star neighbour) to a much longer time ago (objects at the edges of our galaxy).

We measure the students distances in light years. One light year is equivalent to approximately six trillion miles for the distance light travel in 365 day Earth year. Alpha Centauri, at 25 trillion miles from earth is about 4 light years away. The light we see today from the the Andromeda Galaxy left two and a half million years ago: andromida is 2.5 million times 24 trillion miles away.

Stars, which are balls of gas (musli the gases hydrogen and helium), emit radiation. Decorate energy by fusing hydrogen and turning it into helium in their cores. We see the resulting energy as straight light.

Astronomers classify starpress on their size temperature colour and luminosity. Size in the case relates to Mars rather than linear measurement is diameter of. Start start the same way but their lives play out according to their size and mass. The mass of a star determines all of its other characteristics including how hot it is what colour it is and how long it will live. Message stars are hot in blue where are small star are cool and red.

In Stars, Size Matters

Small stars contribute to burn for hundreds of billions of years. The largest asking about 100 times the mass of the sun live shuttle lives burning out after a few millions years and dying with a bang. They’ve become exploding Supernovae that may leave behind remnant of growing gas. Shock waves from Supernovae candid to compress interstellar gas which may include night and becoming new star: stellar recycling.

Nebulae: Birthplace Of Stars

Sasaram born in and out of interstellar dust and hydrogen gas call ed nebula. Neighbourly represent the building blocks of for stars galaxies and planets in the universe.

Admission nebula are hot comedy script flowers of primarily ionized hydrogen that glow with their own light. Reflection nebula amateur bluish glow by reflecting the scattered light of nearby stars. Absorption nebulae or dark nebula, comprise than clouds of gas and thus they appear as silhouettes against the light of brighter objects.

Nebulae form when stars die full stop when the end comes for our son coma for example, its outer layer will heat commerce well and eventually blow off. The hot commented code will create a growing nebula which will in turn become a nursery for new stars.