The Universe Flashcards
If earth was the size of a pea.
Jupiter would be 300m away
Pluto 2.4km away
Proxima Centauri 60,000km away
Estimated Pluto is only 1/50,000 of the way to the outer edge of our solar system.
Nearest star is
Proxima Centauri is 4.2 light years away.
Sirius is 4.6 miles further away
Supernova explodes with the energy of
100 billion suns all at once
In a galaxy of 100 billion stars a supernova happens
Once every 2-3 hundred years.
Average distance between intelligent life according to Frank Drake (professor at Cornell in the 60’s)
200 light years apart.
Estimated number of advanced civilisations in the Milky Way
Based on Frank Drake’s equation (professor at Cornell in the 60’s) even with the most conservative estimates.
In the millions
Average distance between stars is
30 million million km
Average distance between stars is
30 million million km
Karl sagen estimates
As many as 10 billion trillion planets in the universe
Core of a neutron star is so dense
A spoonful of matter from it would weigh 90 billion kgs
In 1965 Penzies and Wilson discovered by accident cosmic radiation
Team at Princeton we’re trying to find it 50km away
Only about x number of stars can be seen with the naked eye.
6000 stars can be seen from earth (2000 from any spot)
With binoculars 50,000
Galaxies each contain how many stars
10’s of billions of stars.
The earth is around
4.2 billion years old.
The universe is around
13.8 billion years old.
