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Bookmark or Share- StarChild: Stars - NASAThe outer shell of the star, which is still mostly hydrogen, starts to expand. As it expands, it cools and starts to glow red. The star has now reached the red giant phase. It is red because it is cooler than the protostar phase and it is a giant because the outer shell has expanded outward. All stars evolve the same way up to the red giant phase.
- What makes stars shine - NASABethe won the 1967 Nobel Prize in Physics for his work concerning energy production in stars. Even More Details: Planet Earth, our bodies, and shining stars are all made of the same basic elements of matter. To understand why stars shine, we must first understand the tiny particles that make up matter. Scientists have studied matter in their ...
- Why does the Sun rise in the east and set in the west? - NASAThe Sun, the Moon, the planets, and the stars all rise in the east and set in the west. And that's because Earth spins -- toward the east. For a moment, let us ignore Earth's orbit around the Sun (as well as the Sun's and solar system's revolution around the center of the Galaxy, and even the Galaxy's journey through the universe).
- What causes a "falling star"? - NASAThese amazing streaks of light you can sometimes see in the night sky are caused by tiny bits of dust and rock called meteoroids falling into the Earth's atmosphere and burning up. The short-lived trail of light the burning meteoroid produces is called a meteor. Meteors are commonly called falling stars or shooting stars.
- What are constellations? - NASAFor example, look at the image below of the stars which make up the constellation Orion. The stars in this easily-observed constellation are at VERY different distances from Earth! At different times of year, different constellations can be seen in the sky. Different constellations can also be seen depending on where you are on Earth.
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