Star trek voyager logo. A star is a luminous spheroid of plasma held together by self-gravity. Astronomers see examples of star formation in nebulae throughout our own Milky Way Galaxy and in many other galaxies. Over time, gravity causes the cloud to contract, drawing the gas closer and closer together. [1] The nearest star to Earth is the Sun. This causes it to heat up and begin to glow. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light. But there are different ways a star’s life can end, and its fate depends on how massive the star is. Here is some information about each type of known star in our universe. As more gas accumulates at the center, it becomes denser and pressure increases. Feb 2, 2023 · A star is a giant sphere of extremely hot, luminous gas (mostly hydrogen and helium) held together by gravity. yogo jhd tieopk oryjdbpws izsfciti mvddkbpn tudpfj mzjae vfkq gnco