Module 1 Lesson 1

Question 1

what is a parallax

Answer 1

paralax is the position of an object seen in two different places. By measuring the apparent movement we can calculate the true position of the star

(example: when you look at a relatively nearby star from earth it appears in a certain position. Six months later when earth is on the opposite side of the sun the same star will appear in a different position.)

Question 2

What does a light year measure? What is an astronomical unit? Why are these measurements
useful to astronomers?

Answer 2

light year measures object outside our solar system.

astrnomical unit measures objects inside out solar system

this is because it makes it easier and convient for astronmers. because using astronmiic units to count far distances will make the numbeers big and hard to work with.

Question 3

What are standard candles?

Answer 3

standard candles is a measure that uses the brightness of an object to determine the distance of how far away they are

ex: The dimmer they appear the further away they are from earth.

Question 4

What is a light year?

Answer 4

A unit of measurement for vast distances is the light year. Light year is the distance that light will travel in one year.

Question 5

Why is a telescope like a time machine?

Answer 5

a telescope is like a time machine because the further the object is the further back in time your looking at

Question 6

practice scientific notations

Answer 6

practice scientific notations

Question 7

what is astronomical units used for?

Answer 7

AU is used to measure distances in our solar system. from the sun to the earth

1 au = distance from sun to earth (1.5 x 10^8 km)

Question 8

what is light years used for?

Answer 8

objects outside the solar system light years are used.