Imagine the Universe!
Imagine Home | Science | Advanced Science | 

Black Holes

Try this!

Do not use any commas in your answers! To make the Earth into a black hole, it would have to be squeezed down to a radius of 0.86 centimeters, about one-half the size of a golf ball.

  1. Using the following equation, confirm the radius of the black hole for the mass of the Earth.

    R = 2MG/c2

    where Me = 5.8 x 1027g, G = 6.67 x 10-8cm3/g/sec2, and c = 3 x 1010cm/sec.

  2. g

  3. cm

This activity was developed by Jacqueline Slay, Largo High School, Largo, MD

Imagine the Universe is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

The Imagine Team
Acting Project Leader: Dr. Barbara Mattson
All material on this site has been created and updated between 1997-2012.

DVD Table of Contents
Educator's Index