Astronomy Picture of the Day · October 2, 1999

Phi Persei: Double Star

The Astronomy Picture of the Day for October 2, 1999 is “Phi Persei: Double Star,” an image. It is credited to Credit: Douglas Gies (CHARA, GSU) et. al.. The original explanation runs about 190 words.

From the explanation

“It’s clear who is the biggest star in this binary system. Based on recent results , this artist’s vision of the double star Phi Persei , 720 light years away, shows a bright, rapidly rotating massive star surrounded by a disk of gas.”

— APOD editors, October 2, 1999

Read the full explanation on science.nasa.gov

At a glance

Date: October 2, 1999
Type: Image
Credit: Credit: Douglas Gies (CHARA, GSU) et. al.
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 190 words

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Source

Astronomy Picture of the Day, October 2, 1999 — science.nasa.gov/image-article/apod-1999-october-02-phi-persei-double-star

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.