Astronomy Picture of the Day ·

NGC 2261: Hubble's Variable Nebula

The Astronomy Picture of the Day for October 20, 1999 is “NGC 2261: Hubble's Variable Nebula,” an image. It is credited to Credit: William Sparks (STScI), Sylvia Baggett (STScI) et al., & the Hubble Heritage Team (AURA/ STScI/ NASA). The original explanation runs about 122 words.

NGC 2261: Hubble's Variable Nebula
Credit: William Sparks (STScI), Sylvia Baggett (STScI) et al., & the Hubble Heritage Team (AURA/ STScI/ NASA) Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“What causes Hubble’s Variable Nebula to vary? The unusual nebula pictured above changes its appearance noticeably in just a few weeks.”

— APOD editors, October 20, 1999

Read the full explanation on science.nasa.gov

At a glance

Date
October 20, 1999
Type
Image
Credit
Credit: William Sparks (STScI), Sylvia Baggett (STScI) et al., & the Hubble Heritage Team (AURA/ STScI/ NASA)
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 122 words

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

Topics in this entry

NebulaeHubble Space Telescope

Topics are matched from words in the title and explanation.

On this day: October 20 in other years

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Source

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.