The planet must have been hit by an _______ or a comet.
astronaut
asteroid
astronomer
celestial object
15
It's the first time __________ had identified an exploding magnetar in another galaxy.
astronaut
celestial objects
asteroids
astronomers
15
The _________ was welcomed with joyous , resounding acclaim
astronaut
pilot license
spacecraft
astronomer
15
The six astronauts on board will spend ten days in ______.
Moon
planet
galaxy
space
15
Astronomers have discovered a distant ______.
Earth
pilot license
galaxy
Sun
15
Pluto is the farthest _______ in the solar system.
planet
orbit
Earth
constellation
15
The displacement is independent of the distance from the observer to the ______________ and a telescope has to be slightly tilted to compensate for the distortion.
asteroids
planet
galaxy
celestial object
15
He earned his airline transport __________ in 2001.
pilot license
constellation
satellite
telescope
15
The ____ was shining brilliantly when all of a sudden darkness descended over the place.
moon
sun
earth
planet
15
Planet ______ is the only planet out of the eight planets in the Solar system that hosts life.
Moon
Earth
Sun
Orbit
15
The ________ makes the craters on the surface of the moon incredibly clear.
reflector
lens
astronomer
telescope
15
Studying the craters on the _____ allowed the scientists to get a better idea of how much water could be found on it.
planet
sun
earth
moon
15
The __________ Ursa Major contains the stars of the Big Dipper.
specks of light
spacecraft
constellation
satellite
15
An _____ is a regular, repeating path that one object in space takes around another one.
orbit
asteroids
astronomer
astronaut
15
The __________ disintegrated as it entered the Earth's atmosphere.