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The light of the Sun that we see today was actually emitted 8 minutes ago. Light travels at a fixed speed, of 299,800 kilometers per second.
The distances to even the closest stars, when measured in kilometers or miles, is an enormously large number. So scientists and astronomers measure stellar distances in terms of how long it takes for light to travel here. So even the nearest star, Proxima Centauri, is so far away that it takes light 4.2 YEARS to get here. So we express this as "4.2 light-years", or LY.
What else can I help you with?
Who was the distributor for Star Wars?
Star Wars was actually an independent film.
The nearest star beyond the sun is Alpha Centauri which is 4.21016 meters away If you were to receive a radio message from this star today how long ago would it have been seen?
Actually the nearest star (except for the sun) is Proxima Centauri is next at 4.3 light-years from the Earth. It would take 3.4 years at one light-year/year for radio waves to reach Earth from there. This is because the radio waves are travelling in a vacuum and all electromagnetic wave in a vacuum travel at "C" AKA the speed of light.
How can spectrum tell us if an object is reflecting blue light from a star?
how can you tell if an object is reflecting blue light from a star
What remnant does a supernova leave?
Depending on the mass of the original star, it is either a black hole or a neutron star.
How long does it take for a ray of light to travel from the nearest star to the earth and what is this star called?
Our Sun is at a distance of 8 light-minutes. The next star outside our Solar System is Proxima Centauri, at a distance of 4.2 light-years.
During which Earth year did the light that you see from Canopus actually leave the star?
The light that we see from Canopus today actually left the star over 310 years ago. Canopus is located approximately 310 light-years away from Earth, so the light we see now started its journey towards us over three centuries ago.
What year did the alpha centauri light leave the star?
If you mean the light we see NOW, it left the star about 4.4 years ago, since that is the distance of the star, expressed in light-years.
Does star twinkle?
because the light of stars travel and twinkles before our eyes,, :|Actually, the atmosphere's interference makes them look like they are twinkling, the light from the star is actually solid. Like our sun. Our sun is a star.
What do you call a star that has no heat or light?
A black dwarf. See related question
What is the star nearest to the sun how many light years away?
Toliman (a.k.a. Rigil Kentaurus, or Alpha Centauri), at a distance of 4.3 light-years. Actually this is a multiple star; one of its components, Proxima Centauri, is at a distance of 4.2 light-years.Toliman (a.k.a. Rigil Kentaurus, or Alpha Centauri), at a distance of 4.3 light-years. Actually this is a multiple star; one of its components, Proxima Centauri, is at a distance of 4.2 light-years.Toliman (a.k.a. Rigil Kentaurus, or Alpha Centauri), at a distance of 4.3 light-years. Actually this is a multiple star; one of its components, Proxima Centauri, is at a distance of 4.2 light-years.Toliman (a.k.a. Rigil Kentaurus, or Alpha Centauri), at a distance of 4.3 light-years. Actually this is a multiple star; one of its components, Proxima Centauri, is at a distance of 4.2 light-years.
How much light do you actually see looking at a star in the night sky?
As many as the stars.
What is the evening or morning star called?
The morning/evening star is Venus. It is actually a planet but is often called a star. It is also the brightest light in the night sky.
What do you understand by the statement a star is eight light years away from the earth?
The light from a star eight light years away will take eight years to reach Earth.
If a star is 2.5 million light years away approximately how long ago did the light leave?
The light from the star would have left 2.5 million years ago, as it takes light 1 year to travel a distance of 1 light year.
What term describes the wavelengths of light from a star that appear to be longer than they actually are?
red shifted
How bright a star actually is a distance of 32.6 light years from earth is called?
That's called the star's absolute magnitude.
How bright a star actually is at a distance of 32.6 light year from earth is called?
the absolute answer is absolute magnitude to be
