Space Flashcards
(25 cards)
How far is our solar system from the center of the Milky Way
27 000 lights years from the center
What is a light year
The distance light travels in a year (10 trillion a year)
What do some galaxies do
Some produce new stars, others are living out their life span and will merge into larger galaxies
Most galaxies are what shape
Spiral-shaped like our or eleptical, their are more
The earth moves how fast
828 000 km/h, which will take 230 million years to travel around the Galaxy
What destroys our ozone layer
CFC’s
What is the closest other star to us
Alpha Centauri which is 4,2 light years away
How fast does light travel a minute
18 million km
How far is the nearest Galaxy
100 000 light years
What is the diameter of our solar system
13 light years in diameter
How far is the earth form the sun
8 light minutes, 150 million km away
How thick is the Milky Way
2000 light years, 20 000 trillion km
What is merger
When two or more galaxies merge and the larger one consumes the smaller one
When was the first telescope made
1608 by a Dutch eye glass maker which had 2x magnification
Who perfected the telescope
1609, Galileo Galilei perfected the telescope with 30x Magnification
What is a optical telescope called
A refracting telescope
A reflecting telescope uses what
Mirrors
Why are reflecting telescopes preferred
As they reflect all wavelengths of light
What is the maximum magnification
Around 120x
Magnification=?
Focal length of the telescope, over focal length of the eyepiece
What is the largest telescope in the Southern Hemisphere called
The SALT( South African large telescope)
What did Galileo see with his telescope
He could see craters on the moon and see more stars in between stars
How many photos has Hubble taken
Over 600 000 photos
What are the best conditions for a optical telescope
Clear sky’s, still air above, dry air, no light pollution and high altitude
