This Planet is Only Half Covered in Lava

The video explores 55 Cancrea E, also known as Janssen, an exoplanet with extreme conditions. Located 41 light years away, Janssen has a year lasting less than 18 hours, resulting in extreme temperatures. One side of the planet is covered in lava, while the other remains solid. The heat distribution is unusual, possibly due to a thick atmosphere or unique rotation. The James Webb Space Telescope is being used to study Janssen's atmosphere, with early results suggesting the presence of lava rain. The planet may also contain diamonds beneath its surface, making it an intriguing target for future exploration.

What is the official name of the planet 55 Cancrea E?

• Janssen

• Copernicus

• Mercury

• Venus

Why is Janssen's hotter side not directly facing its star?

• It has a thick atmosphere that redistributes heat.

• It is locked in a position with perpetual day and night.

• It has a very thin atmosphere.

• It is made entirely of diamonds.

What is one hypothesis about Janssen's rotation?

• It rotates in the opposite direction of its orbit.

• It does not rotate at all.

• It rotates at a speed that allows every part to experience three days and nights.

• It rotates like Earth, with a 24-hour day.

What might the James Webb Space Telescope reveal about Janssen's atmosphere?

• A thin atmosphere with no gases

• A surface covered in ice

• A thick atmosphere of nitrogen or oxygen

• Presence of significant water vapor

What is a potential discovery beneath Janssen's surface?

• Diamond-rich layers

• A sea of water

• A core of iron

• A layer of gold