What does 4 light years away mean?

Explanation: THe speed of light in Vacuum is a constant. It is about 300,000 kilometers per second. When you want to tell the distance o to far away star we can say th e distance i n light years. This means the distance a light beam would take 4 or 5 years to travel.

How many years is a light-year equal to?

A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). One light year is equal to the distance that light travels in one year (it is about ten trillion kilometers, or six trillion miles). One light years is equal to approx 6.5×10^5 earht s years.

Has any astronauts been lost in space?

A total of 18 people have lost their lives either while in space or in preparation for a space mission, in four separate incidents. In 2003 a further seven astronauts died when the shuttle Columbia broke up on re-entry into Earth’s atmosphere. …

How long does it take to travel a light year?

Saying we were a space shuttle that travelled five miles per second, given that the speed of light travels at 186,282 miles per second, it would take about 37,200 human years to travel one light year.

How many astronomical units are in a light year?

For general reference, there are 63,000 astronomical units in one light-year, and 63,000 inches (160,000 cm) in one mile (1.6 km).

How many minutes in a light year?

1 Light Minute: 1 Light minute is 1.798 754 748 x 1010 meters (SI unit). Distance light travels in a vacuum in one minute. 1 Light Year: 1 Light year is 9.460 730 472 5808 x 1015 meters (SI unit). Distance light can travel in a vacuum over a period of 365.25 days.

How do you convert miles to light years?

To convert feet into miles, remember that there are 5,280 feet in a mile: x ft (1 mile/5280 ft) = miles. To convert meters into kilometers, simply divide by 1000: x m (1 km/1000 m) = km. Determine the correct conversion factor. You need to identify the units for the distance that you’re converting to light years.