Space Exploration quiz

More questions about Space Exploration

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   Who became the first American in orbit aboard Friendship 7 in 1962?

   Answer: John Glenn

   Why: At age 77, Glenn returned to space aboard Space Shuttle Discovery in 1998, becoming the oldest person to fly in space at that time.

2. 2 Medium

   Who published evidence for an expanding universe in 1929?

   Answer: Edwin Hubble

   Why: Lemaître derived cosmic expansion two years earlier, prompting the IAU to recommend the name Hubble-Lemaître law in 2018.

3. 3 Hard

   Which mission returned the first clear photographs from the Martian surface?

   Answer: Viking 1

   Why: Viking 1 sent the first clear surface photo on 20 July 1976; Soviet Mars 3 soft landed in 1971 but went silent within seconds, sending only a featureless grey image.

4. 4 Easy

   Outside his spacecraft in 1965, who performed history's first spacewalk?

   Answer: Alexei Leonov

   Why: Leonov's spacesuit inflated unexpectedly in the vacuum of space, forcing him to bleed off oxygen to fit back inside the airlock.

5. 5 Medium

   In which direction does the planet Venus rotate on its axis?

   Answer: Clockwise

   Why: Venus spins backwards so slowly that one turn takes 243 Earth days, longer than its 225 day year, and the Sun there rises in the west.

6. 6 Hard

   How much would a single sugar cube of neutron star material weigh on Earth?

   Answer: One billion tons

   Why: NASA puts it at about a trillion kilograms, which is to say a mountain sitting in the palm of your hand.