“The existence of a recently formed liquid water ocean makes Mimas a prime candidate for study, for researchers investigating the origin of life,” explains Dr Cooper. The discovery was made possible by analysing data from NASA's Cassini spacecraft, which meticulously studied Saturn and its moons for over a decade. By closely examining the subtle changes in Mimas's orbit, the researchers were able to infer the presence of a hidden ocean and estimate its size and depth.

Galileo thought the lunar maria might be seas of water. If you had no better telescope than the one he had, could you demonstrate that they are not composed of water?

(Venus, Mars) has evidence that water is or was once present.

Extremely detailed maps of the Moon and Mars have been in circulation for decades. As a result, University of Miami professor Ved Chirayath was surprised to find out that about ninety percent of Earth’s seafloor, which is significantly closer, was unexplored. He’s now determined to create complex maps showing the bottom of the oceans in high resolution. However, Chirayath had to develop new tools such as specialized digital cameras and lights to help in the project because _____

What makes Europa interesting to scientists?Group of answer choicesIt has a thick atmosphereIt has a liquid water ocean under its surfaceIt has many volcanoesThey have discovered people living there.

1.Question 1The existence of an ocean on Europa has been established from several different lines of evidence. First, spectroscopy of the surface shows that water ice is present. Second, gravitational measurements show that the upper layer of Europa is low density. The third line of evidence is the most convincing. What is this most convincing line of evidence?1 pointElectric currents within the ocean induce magnetic fields which have been measured.Many geological features suggest the presence of liquid underneath the ice.Europa has definitive evidence of plumes of water coming from the interior.When the surface ice shell of Europa flexes due to tidal forces, the magnitude of the effect is much larger than it would be for a thick solid shell.The faint hum of whale songs can be heard coming from underneath the iceEuropa has an oxygen atmosphere