Astronomy M Questions

The first search for radio messages from extra-terrestrial civilizations was called

Project Ozma

What discovery about Saturn's moon Enceladus has encouraged astronomers to think of that moon as a possible place where life might exist?

There are plumes of salty vapor coming from cracks in Enceladus' surface

If alien beings found one of the Voyager spacecraft in a million years, what would they find aboard?

an audio and video record

One place that astronomers think might have had life start long ago is Mars. Which of the following is not a discovery that we have made on Mars so far?

the discovery of organic materials (the chemical building blocks of life, such as amino acids) by spacecraft that have landed

What new technology has made it possible for astronomers to do "optical SETI" - searching for signals for extra-terrestrial civilization, not in the radio band of the spectrum, but in the visible-light band?

we have developed the ability to make laser pulses that are briefly brighter than the Sun