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Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

A starfield with a blue background shows several unusual brown globs. They are generally irregularly shaped. Please see the explanation for more detailed information.

Thackeray's Globules

Explanation: What are these strange space globs? Situated in rich star field s and glowing hydrogen gas, these opaque clouds of interstellar dust and gas are so large they might be able to form stars. Their home is known as IC 2944 , a bright stellar nursery located about 7,600 light years away toward the constellation of the Centaur ( Centaurus ). The largest of these dark globules , first spotted by A. D. Thackeray in 1950 using a telescope in South Africa , is likely two separate but overlapping clouds, each more than one light-year wide. Along with other data, the featured Hubble palette image from the El Sauce Observatory in Chile, indicates that Thackeray's globules are fractured and churning as a result of intense ultraviolet radiation from young, hot stars already energizing and heating the bright emission nebula . These and similar dark globules known to be associated with other star forming regions may ultimately be dissipated by their hostile environment -- like cosmic lumps of butter in a hot frying pan .

Interstellar Jigsaw: Astronomy Puzzle of the Day

Date May 25, 2026
Credit Image Credit & Copyright: John Hayes
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.