Planet Song/Planet 9 Song

The video discusses the hypothetical Planet 9, believed to exist in the outer solar system. Astronomers search for it due to the clustering of Trans Neptunian objects. Theories suggest it could be a giant planet core, possibly ejected from near Jupiter. Despite no observations as of May 2020, its existence hasn't been ruled out. Planet 9's semi-major axis is estimated between 400-800 AU, with an Earth mass of 5-10. The video encourages viewers to consider becoming astronomers to discover this elusive planet.

What is the main reason astronomers believe in the existence of Planet 9?

• Historical records from ancient civilizations

• Its bright visibility in the night sky

• Direct observation through telescopes

• Clustering of extreme Trans Neptunian objects

Who are the astronomers associated with the theory of Planet 9's existence?

• Galileo Galilei and Isaac Newton

• Albert Einstein and Edwin Hubble

• Constantine Battigan and Michael E. Brown

• Carl Sagan and Neil deGrasse Tyson

What is the estimated range of Planet 9's semi-major axis in astronomical units?

• 100 to 200 AU

• 4 to 800 AU

• 500 to 1000 AU

• 1 to 10 AU

What is the believed mass range of Planet 9 compared to Earth?

• 1 to 2 Earth masses

• 5 to 10 Earth masses

• 15 to 20 Earth masses

• 25 to 30 Earth masses

What is the orbital inclination of Planet 9 thought to be?

• 5 to 10 degrees

• 45 to 55 degrees

• 30 to 40 degrees

• 15 to 25 degrees