Stars expand and contract in size due to the balance between gravitational forces pulling inwards and internal pressures pushing outwards. When nuclear fusion in the core of a star produces energy, it creates an outward pressure that can cause the star to expand. As the star's core exhausts its fuel, the outward pressure decreases, causing the star to contract under its own gravity.
Because they begin to run out of fuel
Lowered Pressure
Lowered Pressure
Lowered Pressure
Stars expand in size to become red giants, when they start running low on Hydrogen fuel.
Stars expand and contract in size due to the balance between gravitational forces pulling inwards and internal pressures pushing outwards. When nuclear fusion in the core of a star produces energy, it creates an outward pressure that can cause the star to expand. As the star's core exhausts its fuel, the outward pressure decreases, causing the star to contract under its own gravity.
Because they begin to run out of fuel
Scientists believe that the clumping together of matter to form the first stars after the Big Bang was primarily due to the force of gravity. Gravity caused regions of slightly denser matter to attract more matter towards them, leading to the formation of proto-stars. Over time, these proto-stars accumulated enough mass and pressure to ignite nuclear fusion, giving birth to the first stars in the universe.
Point mutations: Single nucleotide changes can lead to constitutive activation of proto-oncogenes. Gene amplification: Duplication of proto-oncogene sequences can increase gene expression levels, leading to oncogenic transformation. Chromosomal translocations: Rearrangements can cause fusion of a proto-oncogene with a new promoter region, resulting in abnormal activation.
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High temperatures cause rocks to expand
Blue stars expand to become red supergiants. This expansion occurs as they near the end of their life cycle and undergo changes in their core structure leading to increased size and brightness. Ultimately, blue stars can end their lives in a supernova explosion.
No. Stars are born when nebulae collapse, not when they expand.
a proto-type is a model basiclly like a dress that is drawn that is a proto-type
cause they did
Black holes, stars, planets, proto-planets, large and small agglomerates (comets, meteors, interstellar dust), gas clouds.