New study suggests Pluto started out with a liquid ocean

The video explores the hypothesis that Pluto began with a subsurface ocean that has been freezing over time. This theory is supported by images from NASA's New Horizons mission, which show surface features indicating expansion due to ocean freezing. Pluto is believed to have a liquid ocean beneath its icy surface, with heat generated by colliding rocks and radioactive elements. The study also suggests that other large Kuiper belt objects, like Eris, Haumea, and Makemake, may have had liquid oceans.

What evidence supports the idea that Pluto's subsurface ocean has been freezing over time?

• The presence of volcanoes on Pluto's surface

• Temperature measurements from Pluto's atmosphere

• Images showing ridges and troughs indicating expansion

• The discovery of new moons around Pluto

According to the study, what is one source of heat that may have kept Pluto's ocean liquid?

• Heat from Pluto's core

• Collisions with rocks and radioactive decay

• Tidal forces from nearby moons

• Solar radiation

Which journal published the study on Pluto's subsurface ocean?

• Science

• Nature Geoscience

• The Astrophysical Journal

• Astronomy & Astrophysics

What is the composition of Pluto's mantle as suggested by the study?

• Gaseous atmosphere

• Metallic core

• Watery ice

• Rocky material

Which of the following Kuiper belt objects is mentioned as potentially having had a liquid ocean?

• Sedna

• Ceres

• Eris

• Charon