Help make Alexa smarter on Alexa Answers. Sign in with Amazon

Science

How big is planet nine?


The hypothetical planet in the outer region of our solar system, dubbed Planet 9, is estimated to have five to 10 times the mass of Earth, and a radius of two to four times Earth’s. For comparison, Earth is 5.972x10^24 kg and has a radius of 3,958.8 mi (or 6,378.1km)

{{ relativeTimeResolver(1568569947815) }}

LIVE
Points points 65
Rating 0

Similar Questions
Sign in to view all similar questions

Join Alexa Answers

Help make Alexa smarter and share your knowledge with the world

LEARN MORE