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## How fast does the earth spin at 45 degrees north?

733.65611 miles per hour

## How do we calculate how fast speed the Earth is rotating on its axis?

Since speed is equal to the distance traveled over the time taken, Earth’s speed is calculated by dividing 584 million miles (940 million km) by 365.25 days and dividing that result by 24 hours to get miles per hour or km per hour.

## What is the speed of Earth rotation at latitude 45 degree north or south?

At the equator, the circumference of the Earth is 40,070 kilometers, and the day is 24 hours long so the speed is 1670 kilometers/hour ( 1037 miles/hr). This decreases by the cosine of your latitude so that at a latitude of 45 degrees, cos(45) = . 707 and the speed is . 707 x 1670 = 1180 kilometers/hr.

## How fast does the earth spin at my location?

The earth rotates once every 23 hours, 56 minutes and 4.09053 seconds, called the sidereal period, and its circumference is roughly 40,075 kilometers. Thus, the surface of the earth at the equator moves at a speed of 460 meters per second–or roughly 1,000 miles per hour.

## How are we able to see what our galaxy looks like?

A space probe moving at near light speed would take thousands of years to get far enough away to take a parting snapshot. But we can infer the shape of our galaxy by looking outward into space – toward tens of billions of other galaxies.

Orion Spur

## How do astronomers know that the Milky Way has spiral arms?

Radio astronomers use huge telescopes to understand the motions of those hydrogen clouds, which trace the arms. Our planet is between two main arms: the Perseus arm and the Scutum-Centaurus arm. It’s not easy to see these galaxy arms, so astronomers use electronics to observe their motion.

## What makes the Milky Way a spiral galaxy?

As dust and gas is compressed in the spirals, it is heated up and results in the formation of new stars. Astronomers have determined that the Milky Way is a spiral galaxy by mapping the movements of stars and hydrogen clouds in the disk.

## Why do spiral galaxies have arms?

Astronomers believe that galaxies have spiral arms because galaxies rotate – or spin around a central axis – and because of something called “density waves.” Galactic density waves are like water waves. A spiral galaxy’s rotation, or spin, bends the waves into spirals.

## When did the Milky Way become a spiral galaxy?

Gradually, the galaxies that were to become spirals lost most of their big clumps, and a central, bright bulge would appear; the smaller clumps throughout the galaxy would begin to form indistinct, “woolly” spiral arms. These arms would only become very distinct arms once the universe was about 3.6 billion years old.

## What are the 4 galaxies?

In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies.