Enceladus's Super-Thin Ice

The video discusses Enceladus, a moon of Saturn, known for its icy surface and potential for life due to its subsurface ocean. Cassini's radar data suggests thin ice at the South Pole, making it a prime target for exploration. The video also covers a new model addressing the lithium discrepancy in Big Bang nucleosynthesis, proposing that plasma may not have been in equilibrium. The video concludes with a mention of Earth Day and the importance of supporting science.

What makes Enceladus one of the shiniest objects in the solar system?

• Its metallic core

• Its ice-covered surface

• Its proximity to the Sun

• Its volcanic activity

What did the Cassini probe's radar measurements suggest about Enceladus's ice?

• It is melting rapidly

• It is broken into tectonic-like plates

• It is uniformly thick

• It is thicker at the equator

What is the primary source of heat on Enceladus?

• Radioactive decay

• Tidal effects from Saturn's gravity

• Solar radiation

• Volcanic eruptions

What cosmic mystery is associated with lithium-7 in the early universe?

• Its abundance is higher than predicted

• It was not formed at all

• It is the most abundant element

• Its abundance is lower than predicted

What assumption about plasma in the early universe is being challenged to solve the lithium-7 problem?

• Plasma was in equilibrium

• Plasma was too dense

• Plasma was not present

• Plasma was too hot

What do the authors of the new model suggest about the insides of stars?

• They are cooling rapidly

• They are expanding

• They might be out of equilibrium

• They are in perfect equilibrium

What event is mentioned in relation to Earth Day?

• A global cleanup

• A new space mission

• The March for Science

• A solar eclipse