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from article Meteor

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Leonid meteor shower observed at the Modra Astronomical Observatory in Slovakia through a fisheye lens. The exposure on November 16–17, 1998, lasted 4 h. About 150 bolides brighter than magnitude −2 can be seen; the brightest fireball is about…

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from article Ursa Major

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Modern boundaries of the constellation Ursa Major, the Great Bear. The celestial equator is 0° of declination, which corresponds to celestial latitude. Right ascension corresponds to celestial longitude, with each hour of right ascension…

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from article X-ray telescope

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Wolter type I x-ray telescope, in this case the Chandra X-ray Observatory. Two surfaces of revolution (paraboloid and hyperboloid) reflect the incident x-rays to a common focus. The horizontal scale is greatly compressed. (Chandra X-ray Center)

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from article X-ray telescope

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A composite image of the Sun using the Solar Dynamics Observatory (SDO). The x-rays are shown in three colors: red (21.1 nm), green (19.3 nm), and blue (17.1 nm). (Lockheed Martin Solar and Astrophysics Laboratory, Smithsonian Astrophysical…

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from article X-ray telescope

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Schematic of a microcalorimeter. An absorber is kept very cold. Then when an x-ray hits, the temperature change is measured. From this, the energy of the x-ray can be computed. (NASA)

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from article Rocket astronomy

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Launch of a NASA Black Brant XII sounding rocket. (NASA Goddard Space Flight Center)

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from article Rocket astronomy

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Current NASA sounding rockets (2012). (NASA Sounding Rockets Projects Office, Wallops Flight Facility)

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from article Rocket astronomy

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Lift capability of NASA sounding rockets. Apogee is shown as function of payload weight.

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from article Scorpius

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Modern boundaries of the constellation Scorpius, the Scorpion. The celestial equator is 0° of declination, which corresponds to celestial latitude. Right ascension corresponds to celestial longitude, with each hour of right ascension representing…

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from article Archeoastronomy

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Angular swing of the Sun along the horizon at rising and setting from solstice to solstice. The angle is for a latitude of 36°, that of the North American Southwest.

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