Supernova remnant N132D, X-ray image
Supernova remnant N132D. Chandra X-ray Observatory (CXO) image of the supernova remnant N132D, an expanding shell of gas and dust from the explosion of a massive star. This is a rare oxygen-rich type of supernova. The colours show the energy of the X-rays: low energy (red), intermediate energy (green) and high energy (blue). N132D is located in the Large Magellanic Cloud in the constellation of Dorado and is around 160, 000 light years from Earth. The area seen here is around 135 light years across. This image was obtained in 2006, using the CXO's Advanced CCD Imaging Spectrometer (ACIS).
© NASA/CXC/NCSU/K.J.BORKOWSKI ET AL/SCIENCE PHOTO LIBRARY
DNA Double Helix with Autoradiograph
Conceptual computer illustration of the DNA double helix together with a graphic representation of an autoradiograph display. The pattern of the DNA autoradiograph bands is unique to each individual, but some bands are shared by related people, such as a parent & child. DNA fingerprints can be used to prove conclusively whether people are related. The double-helix model of DNA structure was first published in the journal Nature by James D. Watson and Francis Crick in 1953, based upon the crucial X-ray diffraction image of DNA labeled as "Photo 51", from Rosalind Franklin in 1952. The structure of a double-helix elucidated the mechanism of base pairing by which genetic information is stored and copied in living organisms. Genetic fingerprinting and DNA profiling was developed by Dr. Alec Jeffreys and his team in 1985.
© DAVID PARKER/SCIENCE PHOTO LIBRARY
Headache, X-ray artwork
Headache. Computer X-ray artwork of a lateral view of a human skull. The red area represents pain caused by a headache (cephalalgia). Common causes of headaches are tension, migraine, eye strain, dehydration, low blood sugar, and sinusitis. Much more rarely, headaches may be due to life-threatening conditions such as meningitis, encephalitis, cerebral aneurysms, extremely high blood pressure, and brain tumors.
© DAVID MACK/SCIENCE PHOTO LIBRARY