Exploring the Planet Janssen

The video explores the fascinating exoplanet 55 Cancri e, also known as Janssen, which is located 41 light years away from Earth. Janssen is unique due to its extremely short orbit of less than 18 hours and its high temperatures, with one side reaching up to 3,500 degrees Celsius. The video discusses the mystery of Janssen's heat distribution, which is not centered on the side facing its star, Copernicus. Possible explanations include a thick atmosphere or a rotation similar to Mercury's. The James Webb Space Telescope is being used to study Janssen's atmosphere and determine if it is carbon-rich, potentially containing diamonds. The video concludes with a call to support SciShow on Patreon.

What is unique about the planet 55 Cancri e, also known as Janssen?

• It is the coldest planet discovered.

• It has a breathable atmosphere.

• It is thought to be rich in diamonds and partially covered in lava.

• It is entirely covered in water.

How long is a year on Janssen?

• 12 hours

• 18 hours

• 24 hours

• 365 days

What is the temperature on the hotter side of Janssen?

• 1,000 degrees Celsius

• 2,500 to 3,500 degrees Celsius

• 500 degrees Celsius

• 4,000 degrees Celsius

Why is Janssen's hotter half 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 fast rotation like Earth.

• It is covered in ice.

What phenomenon might occur due to Janssen's slow rotation?

• Frequent earthquakes

• Permanent darkness

• Fiery rain at night

• Constant daylight

What tool is being used to study Janssen's atmosphere?

• James Webb Space Telescope

• Spitzer Space Telescope

• Chandra X-ray Observatory

• Hubble Space Telescope

What would indicate a thick atmosphere on Janssen?

• Presence of water vapor

• Presence of nitrogen or oxygen

• Presence of carbon dioxide

• Presence of methane

What might a thin atmosphere on Janssen consist of?

• Vaporized minerals

• Water vapor

• Carbon dioxide

• Oxygen

What is the potential significance of diamonds on Janssen?

• They are used for energy production.

• They indicate a carbon-rich composition.

• They make the planet habitable.

• They cause the planet's rotation.

Why might Janssen be an interesting target for future space tourists?

• It has a mild climate.

• It is the closest planet to Earth.

• It is rich in natural resources.

• It offers a unique and extreme environment.