equations

Question 1

M = m + 5 - (5 log d)

Answer 1

This finds out how bright stars are.
M= absolute magnitude
m= apparent magnitude
d= distance

Question 2

What is the equation of time?

Answer 2

EoT = AST - MST

Question 3

What is the drake equation?

Answer 3

A equation to figure out if we could ever talk to aliens. (N = R* x Fp x Ne x Fl x Fi x Fc x L)

Question 4

What does the N in the Drake equation mean?

Answer 4

number of civilisations where communication is possible

Question 5

What does the R* in the Drake equation mean?

Answer 5

average rate of star formation per year in our galaxy

Question 6

What does the Fp in the Drake equation mean?

Answer 6

fraction of the stars which have planets

Question 7

What does the Fl in the Drake equation mean?

Answer 7

fraction of those planets which could support life

Question 8

What does the Fi in the Drake equation mean?

Answer 8

fraction of life that goes on the develope intelligence

Question 9

What does the Fc in the Drake equation mean?

Answer 9

fraction of those that develope a method of communication

Question 10

What does the L in the Drake equation mean?

Answer 10

length of time signals released into space

Question 11

how do you work out somethings weight?

Answer 11

weight (N) = mass (kg) x gravity (N/kg)

Question 12

what is the inverse square law?

Answer 12

Gravity goes down quickly as it first moves away from the object then slower. (square the distance away (factor the divide by the surface weight.

Question 13

Keplers Third law: working out the time (years) for a planet to complete a whole orbit.

Answer 13

T^2 = R^3
(R = MEAN distance between planet and sun (AU))

Question 14

How do work out eccentricity?

Answer 14

e = 1-(b^2/a^2) 
(a= radius length(longer)
b= radius height (shorter))