Star birth can take millions of years and create families of stars. Astronomers see examples of star formation in nebulae throughout our own milky way galaxy and in many other galaxies. These large, swelling stars are known as red giants.

A star is a luminous spheroid of plasma held together by self-gravity. [1] the nearest star to earth is the sun. Many other stars are visible to the naked eye at night; Their immense distances from earth …