This majestic image of the dazzling green lights of the aurora borealis was captured on March 17, 2015, around 5:30 a.m. EDT in Donnelly Creek, Alaska. via NASA https://ift.tt/80OhVaR
Big, beautiful spiral galaxy NGC 1055 is a dominant member of a small galaxy group a mere 60 million light-years away toward the aquatically intimidating constellation Cetus. Seen edge-on, the island universe spans over 100,000 light-years, a little larger than our own Milky Way galaxy. The colorful, spiky stars decorating this cosmic portrait of NGC […]
NASA astronaut and Expedition 68 Flight Engineer Stephen Bowen holds a small pie that is festively decorated in commemoration of Pi Day aboard the International Space Station. via NASA https://ift.tt/nsQANZ4
What phase of the Moon is 3.14 radians from the Sun? The Full Moon, of course. Even though the Moon might look full for several days, the Moon is truly at its full phase when it is Pi radians (aka 180 degrees) from the Sun in ecliptic longitude. That’s opposite the Sun in planet Earth’s […]
Immediately after splashdown, a recovery helicopter from the USS Guadalcanal hovers over the Apollo 9 spacecraft. Still inside the Command Module are astronauts James A. McDivitt, David R. Scott, and Russell L. Schweickart. Splashdown occurred at 12:00:53 p.m. EST March 13, 1969, only 4.5 nautical miles from the USS Guadalcanal, the prime recovery ship, to […]
A broad expanse of glowing gas and dust presents a bird-like visage to astronomers from planet Earth, suggesting its popular moniker: the Seagull Nebula. This portrait of the cosmic bird covers a 1.6-degree wide swath across the plane of the Milky Way, near the direction of Sirius, the alpha star of the constellation of the […]
Expedition 70 Flight Engineers (from left) Jasmin Moghbeli and Loral O’Hara, both NASA astronauts, are pictured inside the International Space Station’s cupola holding NASA’s first graphic novel, “First Woman.” via NASA https://ift.tt/2mGFUkZ
What’s that over the horizon? What may look like a strangely nearby galaxy is actually a normal rocket’s exhaust plume — but unusually backlit. Although the SpaceX Falcon 9 rocket was launched from Cape Canaveral in Florida, USA, its burned propellant was visible over a much wider area, with the featured photograph being taken from […]
The Moon is seen passing in front of the Sun at the point of the maximum of the partial solar eclipse near Banner, Wyoming on Monday, Aug. 21, 2017. A total solar eclipse swept across a narrow portion of the contiguous United States from Lincoln Beach, Oregon to Charleston, South Carolina. A partial solar eclipse […]
What glows in the night? This night featured a combination of usual and unusual glows. Perhaps the most usual glow was from the Moon, a potentially familiar object. The full Moon’s nearly vertical descent results from the observer being near Earth’s equator. As the Moon sets, air and aerosols in Earth’s atmosphere preferentially scatter out […]