Astronomy Picture of the Day ·

GRB 090423: The Farthest Explosion Yet Measured

The Astronomy Picture of the Day for April 29, 2009 is “GRB 090423: The Farthest Explosion Yet Measured,” an image. It is credited to Credit: Gemini Observatory / NSF / AURA , D. Fox & A. Cucchiara ( Penn State U. ), and E. Berger ( Harvard Univ. ). The original explanation runs about 178 words.

GRB 090423: The Farthest Explosion Yet Measured
Credit: Gemini Observatory / NSF / AURA , D. Fox & A. Cucchiara ( Penn State U. ), and E. Berger ( Harvard Univ. ) Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“An explosion so powerful it was seen clear across the visible universe was recorded in gamma-radiation last week by NASA’s orbiting Swift Observatory . 2, making it the farthest explosion of any type yet detected .”

— APOD editors, April 29, 2009

Read the full explanation on science.nasa.gov

At a glance

Date
April 29, 2009
Type
Image
Credit
Credit: Gemini Observatory / NSF / AURA , D. Fox & A. Cucchiara ( Penn State U. ), and E. Berger ( Harvard Univ. )
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 178 words

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On this day: April 29 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.