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Flashcards in Earth Deck (15):
1

what is uv absorbed by

ozone and oxygen

2

what is microwaves absorbed

water vapour and oxygen

3

what are gamma rays and x rays absorbed by

oxygen and nitrogen

4

what is infa red absorbed by

water vapour, carbon dioxide and methane

5

why is the sky blue

because blue light is scattered the most in our atmosphere

6

what is mean sun

how we would see the sun if a day was 24h

7

what is apparent sun

how we see the sun move across the sky

8

What's a sidereal day

23h 56mins

9

What's a solar day

24h

10

What's apparent magnitude

how bright the star appears

11

What's absolute magnitude

the apparent magnitude of the star if it was observed from 10 parsecs away

12

how was the inner van Allen belt discovered

it was discovered in January 1958 using a geiger counter aboard explorer 1 (designed to detect cosmic rays) it's existence was confirmed by explorer 3 and sputnik 3

13

how was the outer van Allen belt discovered

it was discovered in December 1958 aboard pioneer 3

14

what is the inner van Allen belt made of

high energy protons

15

What's the outer van Allen belt made of

electrons and other charged particles