Astrology

Question 1

Gravity Well

Answer 1

A gravity well is the curvature of space time caused by the gravity of a massive object

Question 2

What does “Asteroid” mean?

Answer 2

Star-like

Question 3

How many asteroids are there in the Solar System?

Answer 3

~1 million

Question 4

What is an asteroid

Answer 4

Objects in space that are smaller than planets that are mostly rocky and metallic and were formed in the warm inner solar system

Question 5

List the 3 types of asteroids

Answer 5

Carbonaceous(Made of Carbon ~75%), Siliceous(~17%), Miscellaneous(Mostly Metal ~8%)

Question 6

Asteroid Desert(Kirkwood gaps)

Answer 6

A gap in the main belt between Mars and Jupiter

Question 7

Why do asteroid deserts form?

Answer 7

At simple fractions & multiples of Jupiter’s orbit, Jupiter would pull them out of orbit with its gravity

Question 8

Why is there a main asteroid belt?

Answer 8

Objects forming at the start of the solar system, after collisions, splitting up into smaller objects

Question 9

What is a Lagrange Point?

Answer 9

Points in an orbit where the gravitational forces are equal, causing them to stay still

Question 10

Where are Lagrange Points?

Answer 10

60 degrees ahead/behind of a planet

Question 11

Equation for gravity

Answer 11

https://drive.google.com/drive/u/1/folders/1p1zWiUjuqvcsPqJAftSdau6ApEUSbfnX

Question 12

Universal law of Gravitation

Answer 12

The idea that all particles are attracted to one another:

gravitational constant * mass of body 1 * mass of body two / distance squred

Question 13

Acceleration due to gravity on Earth

Answer 13

9.81 m/s^2

Question 14

Newton’s 3rd law

Answer 14

Whenever one objects exerts a force on a second object, the second object exerts an equal and opposite force on the first object

Question 15

Foci

Answer 15

Points where the planet moves around within orbit

Question 16

Center

Answer 16

Center of the shape

Question 17

Radius(r)

Answer 17

Average distance from the center of an ellipse

Question 18

Unit of speed for velocity vectors

Answer 18

(km/s)

Question 19

Keyhole

Answer 19

A region of space near Earth that, if an asteroid comes through, Earth’s gravity would bend it enough for the object to impact the Earth a few years later

Question 20

Procedure for avoiding an asteroid impact:
1.
2.

Answer 20

1. Hit the asteroid to move it off course

2. Launch a probe with a decent mass near the asteroid to pull it into a safe orbit with the probe’s gravity

Question 21

Velocity vector graph axes

Answer 21

i speed(where the x-axis would be) represents east-west speed
j speed(where the y-axis would be) represents north-south speed

Question 22

Kepler’s First Law

Answer 22

Every planet’s orbit around the Sun is an ellipse

Question 23

Kepler’s Second Law

Answer 23

Planets do not move with a constant speed while orbiting - they move faster while closer and slower while farther

Question 24

Kepler’s Third Law

Answer 24

The square of the time taken for a planet to orbit the Sun is proportional to the cube of the length of the semi-major axis
-> The farther away a planet is, the longer it takes to orbit

Question 25

Perihelion

Answer 25

Point in orbit that is closest to the Sun

Question 26

Aphelion

Answer 26

Point in orbit that is the farthest from the Sun

Question 27

Kepler’s first law describes the __ of a planet’s __

Answer 27

shape, orbit

Question 28

Kepler’s second law describes how an object’s __ varies along its __

Answer 28

speed, orbit

Question 29

Kepler’s third law __ the __ of objects in __ of different sizes

Answer 29

compares, motion, orbits

Question 30

What’s the difference between asteroids & comets?

Answer 30

Asteroids - Rocky & Metallic, formed in the warmer, inner solar system
Comets - Icy, Dusty, Rocky, formed in the colder, outer solar system

Question 31

Trojan Asteroids

Answer 31

Asteroids that share an orbit with a planet - asteroids clustered around a planet’s LaGrange points

Question 32

Formula for eccentricity

Answer 32

E(eccentricity)

= c(distance between focal points)/a(major axis)

Question 33

True of False: The total distance from the focal points remains constant throughout a planet’s orbit

Answer 33

True