New Evidence for Planet 9! SciShow News

The video discusses the ongoing search for Planet 9, a proposed super Earth beyond Neptune. Recent discoveries of distant objects like 2015 TG387 suggest the presence of this elusive planet. Simulations indicate that Planet 9 could influence the orbits of these objects. However, long-term space travel poses health risks due to cosmic radiation, which can damage the GI tract and other tissues. Despite these challenges, the pursuit of space exploration continues, with hopes of future missions to Mars and beyond.

What is the proposed Planet 9 believed to be?

• A small asteroid near Earth

• A super Earth beyond Neptune

• A moon of Jupiter

• A comet in the Kuiper Belt

How does the size of 2015 TG 387 compare to Pluto?

• It is twice the size of Pluto

• It is about the same size as Pluto

• It is larger than Pluto

• It is almost 90% smaller than Pluto

What is the significance of the similar orbital paths of TG387, Sedna, and 2012 VP113?

• They are all influenced by Jupiter's gravity

• They might be shepherded by a larger object like Planet 9

• They are part of the asteroid belt

• They are all newly discovered planets

What is a major challenge in observing Planet 9 directly?

• It moves too quickly across the sky

• It is hidden behind other planets

• It is too far and faint to be easily seen

• It is too close to the Sun

What potential health issue is associated with long-term space travel?

• Damage to the gastrointestinal tract

• Enhanced muscle growth

• Improved vision

• Increased bone density

What type of cosmic radiation is particularly dangerous during space travel?

• Infrared radiation

• Microwave radiation

• Heavy ion radiation

• Ultraviolet radiation

Why is it difficult to protect spacecraft from cosmic radiation?

• Spacecraft are too small

• Shielding materials are too heavy

• Radiation only affects electronics

• Radiation is not harmful