#PPOD: NASA's Voyager 1 probe launched in 1977 and is now the most distant human-made object from Earth, traveling through interstellar space. Recently, NASA engineers had to figure out why the probe was suddenly sending unreadable data. After nearly six months of analysis and re-programming, they got Voyager correctly transmitting again. Truly a feat of human ingenuity. Credit: Dave Granlund
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#PPOD: NASA's Curiosity rover ran over a rock and found crystals inside! They're pure sulfur. Elemental sulfur is something we’ve never seen before on Mars. We don't know much about these yellow crystals yet, but the team is already at work to figure it out! Credit: NASA/JPL-Caltech
#PPOD: Jupiter’s south pole, as seen by NASA’s Juno spacecraft from an altitude of 52,000 kilometers. The oval features are cyclones, up to 1,000 kilometers in diameter. Multiple images taken with the JunoCam instrument on three separate orbits were combined to show all areas in daylight, enhanced color, and stereographic projection. Credit: NASA/JPL-Caltech/SwRI/MSSS/Betsy Asher Hall/Gervasio Robles
#PPOD: Two large, pale discs can be seen in today's PPOD: one of them in the Atacama Desert, the other orbiting the Earth 384,000 km away. The latter is our ever-present Moon, faintly hanging in the clear blue sky. Next to it is the real star of the image: one of the antennas of the Atacama Large Millimeter/submillimeter Array (ALMA). Credit: Y. Villalon/ESO
#PPOD: JWST's NIRCam captured this picture of the surface of Jupiter’s moon Europa. JWST identified carbon dioxide on the icy surface of Europa, which likely originated in the moon’s subsurface ocean. This discovery has important implications for the potential habitability of Europa’s ocean. The moon appears blue primarily because it is brighter at shorter infrared wavelengths. Credit: NASA, ESA, CSA, G. Villanueva (NASA/GSFC), S. Trumbo (Cornell Univ.), A. Pagan (STScI)
#PPOD: This Magellan full-resolution mosaic shows an area 160 kilometers by 250 kilometers in the Eistla region of Venus. The prominent circular features are volcanic domes, 65 kilometers in diameter, with broad, flat tops less than one kilometer in height. Sometimes called 'pancake' domes, they represent a unique category of volcanic extrusions on Venus formed from viscous (sticky) lava. Credit: NASA/JPL
#PPOD: Due to airglow, which is usually hard to see, the sky can glow like a giant rainbow. Disturbances like storms cause gravity waves, making airglow visible. The colors likely originate from various molecules: deep red from OH molecules at 87 km high, and orange and green from sodium and oxygen atoms higher up. This image was captured on Mount Pico in the Azores, Portugal, with Faial Island's lights in view. Credit: Miguel Claro | Dark Sky® Alqueva
#PPOD: Naturally erupting dust streaks on Mars create structures that look surprisingly like trees near the planet's north pole. These streaks are dark basaltic sand pushed to the surface of sand dunes by sun-heated solid carbon dioxide ice, or dry ice, sublimating directly into vapor. The sand dunes form a nearly complete ring around Mars' north pole and are covered by a thin layer of reddish Martian dust and patches of dry ice. Credit: NASA, HiRISE, MRO, LPL (U. Arizona)
