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.
planet
asteroids
celestial object
galaxy
We have the earth engulfed in _______ which in touching the surface of the earth touches the surface of water.
brightness
planet
darkness
telescope
A _______ ago genetic codes were certainly unknown.
specks of light
decade
century
generation
The __________ disintegrated as it entered the Earth's atmosphere.
spacecraft
satellite
astronaut
telescope
Planet ______ is the only planet out of the eight planets in the Solar system that hosts life.
Earth
Sun
Orbit
Moon
The _________ was welcomed with joyous , resounding acclaim
pilot license
spacecraft
astronomer
astronaut
The planet must have been hit by an _______ or a comet.
astronaut
asteroid
celestial object
astronomer
He earned his airline transport __________ in 2001.
pilot license
satellite
telescope
constellation
NASA _______ rockets into space.
generates
innovates
launches
observes
The ____ was shining brilliantly when all of a sudden darkness descended over the place.
earth
planet
sun
moon
The __________ Ursa Major contains the stars of the Big Dipper.
constellation
spacecraft
specks of light
satellite
Even when the sky is dark, there is always a __________.
spacecraft
constellation
Moon
speck of light
Astronomers have discovered a distant ______.
pilot license
galaxy
Sun
Earth
The ________ makes the craters on the surface of the moon incredibly clear.
reflector
lens
telescope
astronomer
The ______ orbits the Earth every 48 hours.
satellite
specks of light
spacecraft
constellation
Pluto is the farthest _______ in the solar system.
Earth
constellation
planet
orbit
It's the first time __________ had identified an exploding magnetar in another galaxy.
astronaut
celestial objects
astronomers
asteroids
The six astronauts on board will spend ten days in ______.
planet
Moon
galaxy
space
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
An _____ is a regular, repeating path that one object in space takes around another one.
astronaut
asteroids
orbit
astronomer
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