A
small and medium sized stars
dwarf stars
Stars, including the Sun, go through various stages of stellar evolution. The Sun is in what evolutionary stage?
Main sequence
it is the closest star to the sun
Proxima Centauri
What is the relation of size of the star to its lifespan?
the larger it is, the shorter its lifespan
What is the size of the Sun?
Medium-sized
How many planetary systems does the Sun have?
eight
the sun is made of what elements?
hydrogen, helium, and other elements
What is the estimated total lifespan of a star?
10 billion years
Stars, including the Sun, are primarily composed of hydrogen and helium with trace amounts of other elements. How many percent is hydrogen?
74%
the star scientists study the most
Sun
What is the color of the Sun?
Yellow
scientific study of celestial objects, such as stars, planets, galaxies, and other phenomena that exist outside Earth's atmosphere.
Astronomy
Stars, including the Sun, are primarily composed of hydrogen and helium with trace amounts of other elements. How many percent is helium?
24%
process by which the sun makes its own light or generate its energy
nuclear fusion
What is surface temperature of the Sun?
5,500 degrees Celsius
What color of the star is the COOLEST?
Red
refers to the total amount of energy (light) emitted by star at its surface
luminosity
Scientist who used telescopes to observe celestial bodies, discovered the four largest moons of Jupiter, and observed the phases of Venus, supporting the heliocentric model
Galileo Galilei
stars enter this evolutionary stage once they have exhausted the hydrogen fuel in their core and have started to burn helium and other heavy elements.
red giant and supergiant stars
it is the final evolutionary stage of low intermediate mass stars.
White dwarf star
These are celestial objects that emit light and heat due to nuclear reactions occurring in their cores.
Stars
Why do planets orbit/revolve around the Sun?
because of the gravitational pull exerted by the Sun
What is the planetary system closest to the Sun?
Mercury
What is the core temperature of the Sun?
millions of degree Celsius
What is the relation of mass of the star to its lifespan?
More massive stars have shorter lifespans, while less massive stars can live for much longer