ASTR Exam 2 the sky Flashcards
(43 cards)
Does everyone on the Earth experience the same seasons Simultaneously?
No
When is the Earth furthest from the Sun?
July 4
When is the Earth closest to the Sun?
January 3
How is the Earth divided by seasons?
The Northern Hemisphere and the Southern Hemisphere.
What is the reason why we have seasons?
The Earth is tilted 23 1/2 degrees.
How does the tilt of the Earth cause seasonal change?
- The Sun is above the horizon longer during the summer months, and vice versa.
- The sunlight is more direct during the summer months, and vice versa.
When is vernal equinox and how many hours of sunlight do we recieve?
March 21
12 hours
When is summer solstice and how many hours of sunlight do we recieve?
June 22
14 hours
When is autumnal equinox and how many hours of sunlight do we recieve?
September 23
12 hours
When is winter solstice and how many hours of sunlight do we recieve?
December 22
10 hours
How do you measure sizes in the sky?
Angles
How many degrees is the Moon?
0.5 degrees
How many degrees is your finger?
1 - 1.5 degrees
How many degrees is your fist?
10 degrees
How many degrees is your fist with your pinky and thumbs out?
20 degrees
Why does the sky change?
- Because the Earth is moving
- Because the objects in the sky are moving
What are the 2 types of motion?
- Diurnal Motion
- Annual Motion
What is Diurnal Motion?
- the Earth’s rotation
- Daily motion
What is Annual Motion?
- the Earth’s orbit
- Yearly motion
Which way does the Earth rotate and revolve?
The Earth rotates and revolves towards the East
In a time lapse photo, a streak that measure 360 degrees is how many hours?
24 hours
In a time lapse photo, a streak that measure 15 degrees is how many hours?
1 hour
In a time lapse photo, a streak that measure 1 degrees is how many hours?
4 minutes
How many degrees does the Earth revolve every 365 days?
360 degrees
