Space Exploration
Space Shuttle Challenger Disaster

On this cold January morning, the Space Shuttle Challenger broke apart after liftoff, killing all seven astronauts on board. Contrary to popular belief, while the external fuel tank did combust, the Challenger didn’t truly explode as much as it was torn apart by aerodynamic forces.
Apollo 1 Tragedy

Astronauts Gus Grissom, Edward White and Roger Chaffee are killed in a fire during a test of their spacecraft at the Kennedy Space Center. After the fire, the spacecraft and planned launch which never took place was posthumously named Apollo 1, in the astronauts honor.
Ranger 3 Launched

Ranger 3 is launched to study the Moon. The space probe was designed to transmit pictures of the lunar surface to Earth stations during a period of 10 minutes of flight prior to impacting on the Moon. Due to a series of malfunctions, the spacecraft missed the Moon by 22,000 miles.
Opportunity Lands on Mars

Opportunity rover (MER-B) lands on surface of Mars, three weeks after its twin, Spirit (MER-A), touched down on the other side of the planet.
First Fly-By of Uranus

The interplanetary probe Voyager 2 makes the first fly-by of the planet Uranus. During its study of Uranus, it finds 10 previously undiscovered moons.
Voyager 2 still is transmitting data to this day, and a Twitter feed reports on its progress.
Last Contact with Pioneer 10

The last successful contact was made with the spacecraft Pioneer 10, one of the most distant man-made objects in the universe. Pioneer 10 is heading in the direction of the star Aldebaran in the constellation Taurus at roughly 2.6 AU per year. If Aldebaran had zero relative velocity, it would take Pioneer 10 about 2 million years to reach it.

January 22, 1968