Astronomy Picture of the Day · July 31, 2005

Solar System Object Larger than Pluto Discovered

The Astronomy Picture of the Day for July 31, 2005 is “Solar System Object Larger than Pluto Discovered,” an image. It is credited to Credit: M. Brown ( Caltech ), C. Trujillo ( Gemini ), D. Rabinowitz ( Yale ), NSF , NASA. The original explanation runs about 136 words.

From the explanation

“Is that a tenth planet? A faint, slowly moving dot discovered by computer shows clear signs of being a deep Solar System object at least as large as Pluto .”

— APOD editors, July 31, 2005

Read the full explanation on science.nasa.gov

At a glance

Date: July 31, 2005
Type: Image
Credit: Credit: M. Brown ( Caltech ), C. Trujillo ( Gemini ), D. Rabinowitz ( Yale ), NSF , NASA
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 136 words

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Topics in this entry

The Sun

Topics are matched from words in the title and explanation.

On this day: July 31 in other years

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Source

Astronomy Picture of the Day, July 31, 2005 — science.nasa.gov/image-article/apod-2005-july-31-solar-system-object-larger-than-pluto-discovered

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.