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Arno Penzias and Robert Wilson spent months at Bell Labs in New Jersey convinced the faint hiss in their antenna was a fault — pigeons, droppings, loose rivets, all ruled out — before a Princeton physicist told them it was the oldest light in the universe, the afterglow of the Big Bang.
1+ hour, 34+ min ago (319+ words) In May 1964, a chart recorder at Bell Telephone Laboratories registered more microwave power from the sky than Arno Penzias and Robert Wilson could explain....
Juno survives repeated dives through Jupiter’s lethal radiation belts by hiding its electronic brain inside a 180-kilogram titanium vault — because an ordinary spacecraft computer would quickly fail in the storm of high-energy particles
9+ hour, 34+ min ago (409+ words) Juno's survival at Jupiter is not just a triumph of navigation. It is a triumph of hiding. Every close pass takes the spacecraft into a place where...
Most of every galaxy is made of matter nobody has ever seen, detected, or explained — and the clearest early proof came from an astronomer named Vera Rubin, who simply measured how fast the outer stars of galaxies were spinning
10+ hour, 34+ min ago (513+ words) Most of the matter associated with galaxies is not in the stars, gas, dust, planets, or black holes that telescopes can see. It is inferred from gravity, not...
NASA’s Deep Space Network can detect a signal as weak as a billionth of a billionth of a watt from spacecraft billions of kilometres away — using 70-metre dishes to pull a technological whisper out of the noise of space
11+ hour, 33+ min ago (319+ words) By the time a spacecraft's radio signal reaches Earth from the outer Solar System, it is no longer a broadcast in any everyday sense. It is closer to a...
Astronauts insist space has a smell — a mix of seared steak, hot metal and welding fumes that clings to a suit after every spacewalk
14+ hour, 34+ min ago (596+ words) The strangest thing about the smell of space is that no one can smell space directly. Vacuum does not carry scent molecules to a human nose, and an astronaut...
New Horizons flew past Pluto so quickly that an encounter nine years in the making was effectively over within hours — but the data gathered during that brief passage took another 15 months to trickle home
16+ hour, 34+ min ago (771+ words) The New Horizons encounter with Pluto was one of the strangest bargains in modern exploration. NASA spent almost a decade sending a small spacecraft across...
Voyager's signal now reaches Earth as a whisper measured in fractions of a billionth of a watt, fainter than almost anything our antennas were built to hear
18+ hour, 34+ min ago (720+ words) Voyager is not loud anymore. It never really was. The spacecraft carries a transmitter with roughly the power of a household light bulb, and that signal has...
Astronomers have found a super-Earth just 25 light-years away — close enough by cosmic standards that it sits in the small category of worlds scientists consider genuinely worth searching for signs of life
20+ hour, 49+ min ago (356+ words) Imagine standing on a shoreline where the sea is calm, the light is the deep red of a dying ember, and the sky feels close enough to touch. Then picture that...
The most common type of planet discovered in the Milky Way may be a world that does not exist in our solar system — larger than Earth, smaller than Neptune, and wrapped in an atmosphere we barely understand
23+ hour, 39+ min ago (118+ words) The Solar System gives us a familiar catalogue of planets: small rocky worlds close to the Sun, then gas and ice giants farther out. For a long time, that...
Light from the Sun takes about eight minutes to reach Earth, but the energy inside a single photon can spend tens of thousands of years bouncing through the Sun's dense core before it ever escapes the surface to begin that eight-minute trip
1+ day, 2+ hour ago (185+ words) Sunlight takes 8 minutes and 20 seconds to reach Earth from the solar surface. But the energy inside each photon spent tens of thousands of years pinballing through the Sun's core before it ever got out — a random walk through matter thirteen…...