Answer the following questions based on stars and light years:
a) A star is 10 light years away from Earth. Suppose it dies on a certain day after an
explosion, after how much time will we see the explosion from Earth? Give reasons
for your answer.
b) A star is 12 light minutes from a planet. If the speed of light is 3,00,000 km/s, what is
the distance of the star from the planet in km?
Answers
Explanation:
Seeing the star you meant looking at the star and it could could be as light, gravity,radiowaves. So a star 10 light years may die as supernova and it could emits strong gravitational waves that could be detected or either way we discovered CMB cosmic microwave background. Other factors determining the time are dark matter and dark energy in the galaxy considering these facts we could determine the distance
Answer:
Explanation:
A Star that is 100-light years away and explodes will not be seen by us on earth for 100-Years and the Explosion will last as for a long and the Explosion occurred. The Light from the Star will grow brighter over time as it nears the stage of explosion and will be at its brightest during the explosion and will slowly dim as it progress further. Depending on the Type of Explosion (ie.. Size of the Star) we could see a Neutron Start with a Nebula start to form around it as gases are pushed out from the surface of the Star by the Shock wave. When a Star Explodes the length of time for us to see it depends on how far away the Star is. Light travels at 299,792,458 m/(s(Squared)). So, 1 Light-Year is: 9,460,730,472,580,800 meters(Exactly) or ~5.878 625 trillion miles. As you can see this is a great distance for light to travel in 1 year. So, again the distance that a star is in ~equal the amount of time it takes for use to see a change in the star. Hope this helps answer you question