Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Solar Size vs Time
Name: Mark M.
Status: other
Age: 30s
Location: N/A
Country: N/A
Date: 1/10/2004


Question:
Does the sun decrease in size as it is burning. If so, does the size difference relate to the estimated three and a half billion year it is claimed to be?


Replies:
The Sun is actually increasing in size and will become a red giant before shrinking to a white dwarf in many many eons time.

The Sun at the moment pulsates in size, once every 5 minutes or so, by about 200 km in diameter.

Although there is some debate over the age of the Sun, the general consensus is that it is ABOUT 5 thousand million years old.

Howard Barnes



Click here to return to the Astronomy Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory