A star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. source
A star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun.
Most of the stars in the Universe, including all stars outside our galaxy, the Milky Way, are invisible to the naked eye from Earth. source
Most of the stars in the Universe, including all stars outside our galaxy, the Milky Way, are invisible to the naked eye from Earth.
Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy. source
Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy.
UY Scuti is largest known star, It is a bright red supergiant and pulsating variable star in the constellation Scutum. source
UY Scuti is largest known star, It is a bright red supergiant and pulsating variable star in the constellation Scutum.
UY Scuti (- the largest star- was first cataloged in 1860 by German astronomers at the Bonn Observatory during the first sky survey of stars for the Bonner Durchmusterung Stellar Catalogue. source
UY Scuti (- the largest star- was first cataloged in 1860 by German astronomers at the Bonn Observatory during the first sky survey of stars for the Bonner Durchmusterung Stellar Catalogue.
The largest star UY Scuti has the total bolometric power of 340,000 L☉, making it one of the most luminous stars in the galaxy. source
The largest star UY Scuti has the total bolometric power of 340,000 L☉, making it one of the most luminous stars in the galaxy.
Stars are responsible for the manufacture and distribution of heavy elements such as carbon, nitrogen, and oxygen. source
Stars are responsible for the manufacture and distribution of heavy elements such as carbon, nitrogen, and oxygen.
The larger a star, the shorter its life, although all but the most massive stars live for billions of years. source
The larger a star, the shorter its life, although all but the most massive stars live for billions of years.
A star whose brightness as seen from Earth is called variable star. source
A star whose brightness as seen from Earth is called variable star.
A star is born when atoms of light elements are squeezed under enough pressure for their nuclei to undergo fusion.
Sun large mass (332,900 Earth masses)[47] produces temperatures and densities in its core high enough to sustain nuclear fusion of hydrogen into helium, making it a main-sequence star source
Sun large mass (332,900 Earth masses)[47] produces temperatures and densities in its core high enough to sustain nuclear fusion of hydrogen into helium, making it a main-sequence star
The Sun is a G2-type main-sequence star. Hotter main-sequence stars are more luminous.
The Sun's temperature is intermediate between that of the hottest stars and that of the coolest stars.
Stars brighter and hotter than the Sun are rare, whereas substantially dimmer and cooler stars, known as red dwarfs, make up 85% of the stars in the Milky Way. source
Stars brighter and hotter than the Sun are rare, whereas substantially dimmer and cooler stars, known as red dwarfs, make up 85% of the stars in the Milky Way.
The oldest stars contain few metals, whereas stars born later have more.
