Astronomy Picture of the Day ·

Lyman Alpha Blob

The Astronomy Picture of the Day for July 2, 2009 is “Lyman Alpha Blob,” an image. It is credited to Credit: NASA / ESA , CXC, JPL-Caltech, STScI, NAOJ , J.E. Geach (Univ. Durham) et al. Illustration: NASA/CXC/M.Weiss. The original explanation runs about 189 words.

Lyman Alpha Blob
Credit: NASA / ESA , CXC, JPL-Caltech, STScI, NAOJ , J.E. Geach (Univ. Durham) et al. Illustration: NASA/CXC/M.Weiss Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“Dubbed a Lyman-alpha blob, an enormous cloud of hydrogen gas spans several hundred thousand light-years in this remarkable image (left), a composite of x-ray, optical, and infrared data from space and ground based observatories.”

— APOD editors, July 2, 2009

Read the full explanation on science.nasa.gov

At a glance

Date
July 2, 2009
Type
Image
Credit
Credit: NASA / ESA , CXC, JPL-Caltech, STScI, NAOJ , J.E. Geach (Univ. Durham) et al. Illustration: NASA/CXC/M.Weiss
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 189 words

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Topics in this entry

GalaxiesBlack holes

Topics are matched from words in the title and explanation.

On this day: July 2 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.