Astronomy Picture of the Day · December 6, 2015

A Force from Empty Space: The Casimir Effect

The Astronomy Picture of the Day for December 6, 2015 is “A Force from Empty Space: The Casimir Effect,” an image. The picture is copyrighted by its creator (Image Credit & Copyright: Umar Mohideen ( U. California at Riverside )). The original explanation runs about 166 words.

From the explanation

“This tiny ball provides evidence that the universe will expand forever. Measuring slightly over one tenth of a millimeter, the ball moves toward a smooth plate in response to energy fluctuations in the vacuum of empty space.”

— APOD editors, December 6, 2015

Read the full explanation on science.nasa.gov

At a glance

Date: December 6, 2015
Type: Image
Credit: Credit: Image Credit & Copyright: Umar Mohideen ( U. California at Riverside )
Copyright: Copyrighted by the credited creator. Ask the copyright holder before reusing it.
Explanation length: About 166 words

All of December 2015 → · 2015 by month → · Full archive since 1995 →

On this day: December 6 in other years

On Amazon

Popular picks for space fans

As an Amazon Associate I earn from qualifying purchases.

Electronics Amazon Kindle Paperwhite Signature Edition 32GB Read astronomy and space-history books anywhere. View on Amazon → Electronics Bose QuietComfort Wireless Headphones Noise-cancelling headphones for documentaries and launch livestreams. View on Amazon →

Source

Astronomy Picture of the Day, December 6, 2015 — science.nasa.gov/image-article/apod-2015-december-6-a-force-from-empty-space-the-casimir-effect

Copy taken Oct 28, 2026, 2:39 AM EDT. The image and explanation belong to their creators. OpenOrbit is not affiliated with or endorsed by NASA.