Bikini Atoll atomic bomb explosion 1946
Coloured photograph of the mushroom cloud of water and radioactive material produced by the test detonation of an atomic bomb at Bikini Atoll in the Pacific Marshall Islands, on July 25th, 1946 (codenamed: "Baker Day"). The explosion was part of a series of atom bomb tests code-named "Operation Crossroads". The photograph was taken by an automatic camera situated on an island some miles away from the blast centre.
© Los Alamos National Laboratory/Science Photo Library
Gamma ray burst eruption
Gamma ray burst eruption. Image 5 of 5. Computer artwork of the jet (white) of a gamma ray burst, erupting from a star's surface (across bottom). This is based upon the collapsar theory of GRBs that says GRBs result from the collapse of the core of a massive star. A black hole forms when the core collapses. The spin or magnetic field of the black hole forms jets from material that is being ejected at near the speed of light. The jets are the source of the gamma rays of the GRB, a massive short-lived burst of energy that is 100s of times brighter than an ordinary supernova. For GRB formation, see images R670/148-152. For GRB jets, see images R670/153-154.
© Nasa/Science Photo Library
Gamma ray universe
Artist's impression of the universe as it might appear if our eyes were sensitive to gamma rays. The gamma ray sky is dominated by emmissions from exploding stars and black holes lying within our galaxy and by the energetic cores of distant active galaxies. Ordinary, middle-aged stars like the Sun are almost invisible at gamma ray wavelengths. The image shows the band of the Milky Way running from lower left to upper right. This is dominated by gamma ray emission from the galactic core (lower left), which may contain a massive black hole. A bright supernova explosion is seen at lower right.
© Julian Baum/Science Photo Library