They don't. Light years are a distance measurement, not a time measurement.
Astronomers measure light years in space by calculating the distance that light travels in one year. They use the speed of light, which is about 186,282 miles per second, to determine how far light can travel in a year. This distance is equivalent to one light year. By observing the time it takes for light to reach Earth from distant objects in space, astronomers can estimate their distance in light years.
You can use it with lightyears and stuff.
Astronomers discovered an object pulsing waves in space by observing changes in the intensity of its light over time. This pulsing pattern indicated that the object was emitting regular waves of energy, which led to the discovery of its pulsar nature.
Space. In fact, astronomers consider time and space to be inextricable from one another. They call it "timespace".
You cant see a black hole because the gravitational pull of it is so strong that not even light can escape from it. Astronomers find them through observing the space matter that they pull into them, not the hole itself.
A light year is a measure of distance. It is the distance light travels through the vacuum of space in one year's time. This is about 5.86 trillion miles.
A light-year is a measure of distance, not time as many people mistakenly believe. One light-year is the distance light can travel in one year in the vacuum of space. One light-year equates to 5.8785 trillion miles.
they transmit radio wave frequency to space and check for the their return or reflecting time , same as that used to calculate speed of light, for calculating the distance of galaxy. if the return radio frequency has increased, then they are moving closer to earth and vice versa. thank you
the measure time
A light year is a measure of distance. It is the distance light travels through the vacuum of space in one year's time; about 5.86 trillion miles.
Light years are used to measure the great distances of space. One light year is about 5.86 trillion miles. This is the distance light travels in one year's time.
Light years are used to measure the great distances of space. One light year is about 5.86 trillion miles. This is the distance light travels in one year's time.