Answer: Three hearts

Answer: Cancer
Oncology is the study and treatment of tumors. Every year, 12.4 million people discover they have cancer.

Answer: Neptune

Answer: Magma

Answer: A prickle

Answer: A Neutron

Answer: Pierre-Simon Laplace has an Erdős number of at most 14!
According to "The Erdös number project" a path to Laplace was found by Leonid Yanushevich giving the famous mathematician an Erdös number of at most 14.

Answer: two thousand

Answer: 15 million degrees Fahrenheit

Answer: 8 minutes and 20 seconds
Photons emitted from the surface of the Sun travel across the vacuum of space to reach our eyes.