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They first used parallax which makes sense but now they use radar signals. Radar signals travel at the speed of light and they send a powerful one out to rebound off of a planet and time how long it takes to return.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoLight speed
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What unit do scientists mesure huge distance in space in?
A light year, which stands the distance light travels in a year's time, is roughly 1E16 m.
Why do scientists use full scale mockups of space vehicles and the International Space Station before a real mission?
To make sure it can go the distance and back
Why do scientists use an astronomical unit to measure distances in the solar system?
Because it is a large measurement to measure a large distance (there would be immense amoughts of zeros behind a measurement like that given in miles, yet a lightyear is much too large). It is simply the right unit to measure distances that large.
An astronomical measure of distance is called?
An astronomical measure of distance is called?
Does the space shuttle have a future in space?
scientists proving yes
Why is it necessary for scientists to use AU to measure distance in space?
It's more convenient for scientists. AU is the distance the earth is from the sun.
What measurement do scientists use for the distance between stars and Earth?
scientists use light-years to measure long distances in space. a light year, (abrviated ly) is the distance light can travel.
Do scientists measure tsunamis from space?
Yea they do =)
How do you measure the distance or space of the distance clip?
how do you measure the distance or space of the distance clip. this clip use in textile spinning mills. it is errected on the craddle.
What is the measurement used to measure distance in space?
Distance in space is measured in 'light years' or in 'scientific notation'
What do scientists use to accurately measure the distance between the earth and the moon?
a stick.
How do scientists use computers to measure distance from stars?
From what I remember in two geology classes, scientists measure the distance between a star and Earth by comparing "red shift," a shifting of certain bands of light toward the "red" end of the spectrum. The further the shifting, the greater the distance.
Why scientists use light years to measure distance in space in stead of kilometers?
It is far more convenient to express space distance in light years instead of kilometers. 1 light year = 9.4605 x 10^12 km 1 light year = 5.8745 x 10^12 miles
When would you use a light year?
When I want to measure a distance in space.
What two units are used to measure distance in space?
Lightyears and miles
Which unit would a scientist use for measuring the distance traveled by a car?
Scientists use Kilometers to measure distance traveled by a car
What unit of distance used to measure items in space?
Light years: the distance that light travels in a year.
