## Astronomy Resources

Its related to newton law of gravity, but I just don't understand the math.

Potassium-40 decays to Argon-40 with a half-life of 1.25 billion years.   Multiple choice options   <<1 1  25 100 250 500 999 Planet X is 10 times farther from the Sun than Earth (10 AU). How long does it take this planet to go around the sun? Unit Conversion Exercise

If one centimeter on the map above equals 31 miles, our vehicle gets 13 miles per gallon of gasoline, and gasoline costs \$ 3.99 per gallon, how much will it cost to drive to the ski lodge? To... What is the green house effect and what causes it on Earth?

What is the green house effect and what causes it on Earth? The glacial ice that covers the continent of Antarctica is divided into two massive sheets by the transAntarctic mountain range...

Astronomy-based question. Question: Cutter is a star with an apparent magnitude of +2.3 and an absolute magnitude of -1.1. Casper is a star with an apparent magnitude of -3.7 and... Redshift and Blueshift changes

In reality the galactic motion in the Universe is a mixture of the two. Consider looking at galaxies with several different redshift values. Consider the following two cases:  PART A)  Classical... How fast is this star moving?

A line in a star's spectrum lies at 400.0 nm. In the laboratory, that same line lies at 400.2 nm. How fast is this star moving? Is it moving towards or away from us? Acceleration is defined as the change in velocity over time so a=v/t.

If you have a car that can accelerate with a=5m/s^-2, how long does it take the car to reach a velocity of v=25m/s^-1 (which is equivalent to 90km/h) ? Show all the steps taken to get to the answer...

Show all the steps taken to get to the answer. How many times do we have to put our Galaxy side by side to reach the Andromeda Galaxy?

Note that the diameter of the Milkyway is 100,000 light years. The distance to the Andromeda Galaxy M31 is 2.5 Million light years. Show all the steps taken to get to the answer. How many meters are in a light year? Note that a year is roughly 3.14x10^7 s.

Show all the steps taken to get to the answer. 