The Voyager 1 spacecraft now at the immense distance of 18.5 billion kilometers (145 AU) from earth. In 2017, thrusters were operated by NASA to adjust the orientation of the spacecraft; the signal from the spacecraft took 19 hours and 35 minutes to reach an antenna in Goldstone, California.
Category:
Astronomy
The observation of gravitational waves from cosmic events opens a dramatic new window on the universe. The first four events observed by gravitational waves were merging black holes with masses between 7.5 and 35 solar masses.
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