stars LC

what fuels the sun and all stars?

nuclear fusion

how does energy from the sun reach the earth?

electromagnetic radiation

how can we estimate the age of the sun and its lifespan?

with how much fuel it uses

nucleosynthesis

process by which new elements are formed inside stars

How does nucleosynthesis produce elements?

through nuclear fusion

nuclear fusion

when two light atomic nuclei combine to form a heavier nucleus. This releases lots of energy during the process

how do scientists determine distances in space

parallax and redshift

parallax

how an object appears to shift from its background when viewed against different positions

why don’t we know if something 700 lightyears away has exploded

since its so far away we couldn’t see it. If it did explode, we would know abt 700 years after

when will the sun burn out

approximately in 5 billion years since its lifespan is 10 billion years and its alr abt 4.6 billion years old

what is in the center of the sun and releases energy to the earth as radiation?

nuclear fusion

how are heavy elements created?

when certain massive stars achieve supernova stage and explode

how do stars create elements

nuclear fusion

why do we study stars

to identify the compositional elements of stars, their movements, distances from earth, and life cycles