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How long would it take a beam of light to travel the solar system?
It takes light about 8 minutes and 20 seconds to travel from the Sun to Earth. Since the solar system spans a distance of about 4.24 light-years, it would take light approximately 4.24 years to travel from one end to the other.
What planet takes the longest to orbit the sun after neptune?
Of the 8 planets, Neptune is the furthest planet from the sun, taking the longest time to complete one orbit, 164.79 years in total. There are Dwarf planets and other bodies yet to be confirmed as dwarf planets, which are further out from the sun than Neptune. Pluto in one such dwarf planet, which takes 248 years to complete one orbit. Eris is the furthest of the five dwarf planets though, this takes 557 years to make one orbit of our sun. There is also Sedna, not currently classed as a dwarf planet, but it is thought to be one by many. Sedna's furthest point in orbit away from sun) is estimated to be 960 astronomical units (32 times Neptune's distance), while its closest apprach is 76 astronomical units (AU). It is though to take around 11,400 years to make one orbit of our sun.
How old is sunlight when it hits Earth?
Sunlight is about 8 minutes and 20 seconds old when it reaches Earth, as it takes that much time for light to travel from the Sun to our planet.
When you see a galaxy 8 billion light years away you are how many years into the past?
When you see a galaxy that is 8 billion light years away, you are observing it as it was 8 billion years ago because light takes time to travel across such vast distances.
How long is one year on Saturn?
Saturn takes 10,832 Earth days (29.66 Earth years) to go around the Sun once. Since one day on Saturn is 10.656 hours long, it takes 24,396 Saturnian days for Saturn to go around the sun once.
