Some analysts believed that BlueWalker 3 might become one of the brightest objects in the night sky, outshining everything except the Moon. BlueWalker 3's is about the size of a squash court.Īstronomers have been anticipating and dreading the deployment for months. To detect weak cell phone signals from Earth's surface it needs a very large antenna. 'The array has been fully deployed,' he says.īlueWalker 3 is a revolutionary communications satellite designed to provide cell phone service from space. Here are two selfies of the array in orbit alongside members of the mission team: More images: from Michael Karrer of AustriaīLUEWALKER 3 UPDATE: The CEO of AST SpaceMobile, Abel Avellan, confirmed in a Tweet this morning that BlueWalker 3 has successfully unfurled its huge antenna. A full-fledged flare may not be far behind. Opposite polarities bump together, reconnect, and-boom. A single Ellerman bomb releases about 10 26 ergs of energy-equal to about 100,000 World War II atomic bombs.Įxplosions like these are a sign of magnetic complexity in a sunspot. They are named after physicist Ferdinand Ellerman who studied the tiny blasts in the early 20th century. All this action took place during a brief 30 second exposure.Įllerman bombs are magnetic explosions about one-millionth as powerful as true solar flares. Weiller caught more than a dozen explosions underway in sunpot AR3140 (left) and a few in sunspot AR3141 (right). Sylvain Weiller photographed the phenomenon today from Jerusalem, Israel:Ī sampling of the bombs are circled for reference. Aurora alerts: SMS TextĮLLERMAN BOMBS: Sunspot AR3140 is crackling-not with flares, but with Ellerman Bombs. High-latitude sky watchers should be alert for auroras at the end of this week. It is flowing from a southern hole in the sun's atmosphere. LONG-RANGE FORECAST: A fast-moving stream of solar wind is expected to hit Earth's magnetic field on Nov.

Neutron counts from the University of Oulu's Sodankyla Geophysical Observatory show that cosmic rays reaching Earth are slowly declining-a result of the yin-yang relationship between the solar cycle and cosmic rays. Credit: SDO/HMIĬosmic Rays Solar Cycle 25 is beginning, and this is reflected in the number of cosmic rays entering Earth's atmosphere. Sunspot AR3140 has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares.

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