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Jan 1, 613
First known sitghting of Halleys Comet
In 613 BC Chinas annals record a great comet this was the first known sighting of Hallleys Comet and perhaps one of the earliest records of a comet -
Mar 29, 1577
Comet distance from moon
Tycho Brahe mearsures the position of a great comet and compares it with sightings from other places in Earth ,proving that its roughly 4 times further from the moon. -
first asteroid discovery
the first asteroid was discovered, it was named Ceres ut was duscivered by an italian astronomer Giovanni Piazza -
airbust
an airbust happens and flattens trees -
dino extinction to asteroid
Luis Alvarez discovers that a massive asteroid is what led to the extinction of dinosaurs -
first systematic search for asteroids
spacewatch survye starts up at the university of arizona led by gehrels -
space program to search
US congress appointed panel proposes spaceguard program to search for all near earth asteroids larger than 1 kilometer across within 10 years -
space program
a space program was a created to search for nearby asteroids that were considered a threat -
comet shattered
comet named shoemaker-levy 9 is discovered, it looks like a string of pearls.this comet crashed into jupiter, -
rate of asteroid discovery increased
the NEAT ( near earth asteriud tracking) project started and more asteroids began to get discovered -
calm comet earth striking fear
The Torino Scale is published by astronomer Rick Binzel. to calm people of public fears -
highest impact possibility
an asteroid was discovered that had the highest possibility of impact -
yarkosvky effect
the Yarkosvky Effect was discovered this was known to be able to move asteroids and prevent collison -
Nasa collison
Nasas spacecraft stardust was the first to get into a collisioin with a comet -
stardust returns
their spcacecraft returns with a samples of comet dust
