What is a star form called?
From Wikipedia, the free encyclopedia. Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as “stellar nurseries” or “star-forming regions”, collapse and form stars.
Why do molecular clouds exist?
Molecular clouds are so important because they are the raw material of stars and planets. Such a density can only occur if the temperatures are very low, otherwise the thermal pressure of the gas would lead to an expansion of the dark nebula and no new stars would be able to form.
Are there gas clouds in space?
A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova. Other nebulae are regions where new stars are beginning to form.
Do molecular clouds form stars?
Star formation The formation of stars occurs exclusively within molecular clouds. This is a natural consequence of their low temperatures and high densities, because the gravitational force acting to collapse the cloud must exceed the internal pressures that are acting “outward” to prevent a collapse.
What is the smallest mass a newborn star can have?
What is the smallest mass a newborn star can have? A quantum mechanical effect known as degeneracy pressure halts the contraction of a protostar with a mass less than 0.08 times the Sun before its temp grows high enough to sustain fusion. Starlike objects with objects below this limit are brown dwarfs.
What is a newborn star called?
protostars
What size stars live the longest?
Generally, the bigger a star is, the faster it uses up its supply of nuclear fuel, so the longest-lived stars are among the smallest. The stars with the longest lifetimes are red dwarfs; some may be nearly as old as the universe itself.
How does nuclear fusion begin in a newborn star?
Conservation of angular momentum leads to the formation of disks around protostars. Increases the mass of the star. How does nuclear fusion begin in a newborn star? The Sun shines because gravitational equilibrium keeps its core hot and dense enough to release energy through nuclear fusion.
What is a dead star called?
White dwarfs are dead stars. A single white dwarf contains roughly the mass of our sun in a volume no bigger than our planet. Our sun will become a white dwarf someday.
What is the color of Barnard’s Star?
red
What is the shiniest star?
Sirius