What is the range of light travel times to the Earth from the Sun?
On January 2 the Earth is closest to the Sun at 0.9832674 AU so that the light travel time is 476.6 seconds. On July 5 we are the farthest from the Sun at 1.0167535 AU or a light travel time of 492.8 seconds. Return to the Ask the Space Scientist main page. All answers are provided by Dr. Sten Odenwald (Raytheon STX) for the NASA IMAGE/POETRY Education and Public Outreach program.
