Sputnik 1: was the first artificial satellite. It was in orbit 3 months.
The main mission was study affects of a biological creature in a cretin amount of time on a dog named Lakia. Only made it for 2 days.
Physiological set up a Chimpanzee named Ham. 60 min 39 sec.
The first human in space Buikohar. 108 min. It is still in use today
The first American in space (Alan Shepard) it was going to be the first human to orbit the earth
there were 1-12 missions. Outside in a space suit. Space walks
Was the 4 in a series to do a fly. Performed first fly by Mars Mission.
First successful moon landing by Neil Armstrong
was the first spacecraft to travel trough the Asteroid Belt. First satellite to take close ups
Measure Mercury surface
Was part of the voyager program to study the outer solar system. they took advantage of a rare planetary alignment . NO humans and its still going
Study Pluto system