Astronomy Picture of the Day ·

The Incredible Expanding Cat's Eye

The Astronomy Picture of the Day for September 16, 1999 is “The Incredible Expanding Cat's Eye,” an image. It is credited to Credit: Arsen R. Hajian (USNO), Yervant Terzian (Cornell). The original explanation runs about 159 words.

The Incredible Expanding Cat's Eye
Credit: Arsen R. Hajian (USNO), Yervant Terzian (Cornell) Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“Watch closely. As this animation blinks between two Hubble Space Telescope images of NGC 6543 – the first from 1994 and the second from 1997 – the intricate filaments of this nebula are seen to shift.”

— APOD editors, September 16, 1999

Read the full explanation on science.nasa.gov

At a glance

Date
September 16, 1999
Type
Image
Credit
Credit: Arsen R. Hajian (USNO), Yervant Terzian (Cornell)
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 159 words

All of September 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: September 16 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

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.