Astronomy Picture of the Day · October 17, 1999

Black Holes in Galactic Centers

The Astronomy Picture of the Day for October 17, 1999 is “Black Holes in Galactic Centers,” an image. It is credited to Credit: D. Richstone (U. Mich) et al., HST, NASA. The original explanation runs about 121 words.

From the explanation

“Do all galaxies have black holes at their centers? Although not even a single galaxy has yet been proven to have a central black hole , the list of candidates continues to increase.”

— APOD editors, October 17, 1999

Read the full explanation on science.nasa.gov

At a glance

Date: October 17, 1999
Type: Image
Credit: Credit: D. Richstone (U. Mich) et al., HST, NASA
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 121 words

All of October 1999 → · 1999 by month → · Full archive since 1995 →

Topics in this entry

Galaxies Black holes

Topics are matched from words in the title and explanation.

On this day: October 17 in other years

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Source

Astronomy Picture of the Day, October 17, 1999 — science.nasa.gov/image-article/apod-1999-october-17-black-holes-in-galactic-centers

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.