Caption: An astronomer friend mentioned that with welder's helmet/eye shield, there was a large sunspot visible to the naked eye. Clamped on a 800 neutral density filter and maxed out my camera soon to see the details. From what I understand, the sunspot is several times larger than the planet Earth
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A close-up of Astronaut John Grunsfeld shows the reflection of Astronaut Andrew Feustel, perched on the robotic arm and taking the photo. The pair teamed together on three of the five spacewalks during Servicing Mission 4 in May 2009.
Thor's Helmet is a nebula found in the constellation Canis Major. As seen in this recently released picture from the Cerro Tololo Inter-American Observatory in Chile, the cosmic cloud of dust and gas is being shaped like a winged helm by outpourings of radiation from the massive stars inside.