General Articles

OBSERVING THE MOON

National Science Week 2 August to 9 August Observe interesting geographical areas of the Moon using binoculars and telescopes on 8 and 9 August from 5.30 to 8pm at the Wine Village Wine and Food Festival (cnr R43/Hemel-en-Aarde Road, opposite Engen) weather permitting Hosted by the amateur astronomers of the Hermanus Astronomy Centre Attendance is …

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Astrophysics with H.E.S.S.

Gamma Rays are the most energetic form of radiation and are produced by the most extreme objects (such as neutron stars and pulsars, supernova explosions, and regions around black holes) in the Universe. A single object undergoing a gamma ray burst can momentarily shine 10 x brighter than an entire galaxy which contains hundreds of …

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Fermi finds a “transformer” pulsar

This artist’s rendering shows one model of pulsar J1023 before its radio emission (green) vanished. Normally, an outflow of high-energy particles from the pulsar staves off the gas stream from its companion. NASA’s Goddard Space Flight Center An exceptional binary containing a rapidly spinning neutron star underwent a dramatic change in behavior never before observed …

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New mass map of a distant galaxy cluster is the most precise yet

Created using observations from Hubble’s Frontier Fields observing program, the map shows the amount and distribution of mass within MCS J0416.1–2403. By Hubble ESA, Garching, Germany | Published: Thursday, July 24, 2014 Astronomers using the NASA/ESA Hubble Space Telescope have mapped the mass within a galaxy cluster more precisely than ever before. Created using observations …

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Ten Years at Saturn: Cassini’s 10 Greatest Pictures

On July 1, 2004 at 12:12 a.m. ET—10 years ago—the main engine on board the Cassini space probe cut off. When the burn was over, Cassini had achieved a milestone in human history: It became the first spacecraft to enter Saturn orbit. Click here to read Phil Plait’s article and view these spectacular images.