๐บ๐ธ ๋ฏธ๊ตญ ยท "SPACECRAFT" ยท ์ด 20๊ฑด
ํํฐ ๋ณด๊ธฐํ์ฌ ์ง์
48.9
0 = ๋ถ์ ์ฐ์ธ
50 = ์ค๋ฆฝ
100 = ๊ธ์ ์ฐ์ธ
์ต๊ทผ 7์ผ ๊ธฐ์ค 10,443๊ฑด์ ๋ถ์ํ ๊ฒฐ๊ณผ, ๋ด์ค ์ฌ๋ฆฌ์ง์๋ 48.9(๊ท ํ)์ ๋๋ค. ๊ธ์ 1,035๊ฑด(9.9%)ยท์ค๋ฆฝ 7,533๊ฑด(72.1%)ยท๋ถ์ 1,875๊ฑด(18.0%)์ด๋ฉฐ, ์ค๋ฆฝ ๋น์ค์ด ๋๋ ทํ๊ฒ ๋์ต๋๋ค. ์ฑํฅ ์ง์๋ ์ข ํฉ 20.8(๋ณด์ ๊ฒฝํฅ)์ ๋๋ค.
The national security spacecraft company, led by former NASA Administrator Jim Bridenstine, will list on Nasdaq under the ticker "QSPC"
Five astronauts were briefly forced to take shelter, or "safe haven," while new air leaks were being repaired on the International Space Station. The astronauts boarded a spacecraft attached to the ISS while two cosmonauts assessed the situation. The crew resumed normal duties about two hours later. CBS News space consultant Bill Harwood has more details.
NASA astronauts resumed normal operations aboard the International Space Station (ISS) on Friday after briefly sheltering in the docked SpaceX Dragon spacecraft.
Astronauts aboard the International Space Station were ordered Friday to shelter inside a docked SpaceX Crew Dragon spacecraft after a persistent air leak in the Russian section of the orbiting laboratory worsened. NASA mission control issued the order at approximately 9:04 a.m. Eastern as Russian cosmonauts worked to repair the leak. Reuters reports a senior ...
Out of an abundance of caution, NASA briefly directed five of the seven crew members aboard the International Space Station to wait inside the docked SpaceX Crew Dragon "Freedom" spacecraft.
NASA said Friday that astronauts at the International Space Station have been ordered to prepare for an evacuation due to a worsening air leak in Russiaโs portion of the orbital laboratory. Two U.S. astronauts, as well as a French and a Russian astronaut, received orders to shelter in place in their spacecraft in case the air [โฆ]
Orbit Robotics built Helios, a four-armed robot designed for zero gravity that grips and braces inside spacecraft while performing maintenance tasks.
The space agency confirmed Wednesday that the mission had ended after more than a decade of observations.
โI think the team has really experienced the loss of a loved one with the end of the mission.โ
NASA on Wednesday announced that its Mars Atmosphere and Volatile Evolution (MAVEN) orbiter mission has ended, almost half a year after scientists last heard from the spacecraft. All systems were working normally before MAVEN's passage behind Mars in December, the space agency said in a statement. NASA's Deep Space Network was unable to find a...
NASA has ended its MAVEN mission after losing contact with the spacecraft after an 11-year exploration of Marsโ atmosphere and climate.
To travel between solar systems, a spacecraft would need extremely sophisticated โ if not impossible โ technology.
Dr. Hal Puthoff claims the U.S. has recovered remains of four separate species of alien life from UFOs, citing people involved in the recoveries.
China launched the Shenzhou 23 spacecraft Sunday night with three astronauts heading to its space station, including one set to stay in space for a year.
China launched the Shenzhou 23 spacecraft with 3 astronauts heading to its space station. One astronaut is set to stay in space for a year to explore human adaptability in long-duration spaceflights.
China launched the Shenzhou 23 spacecraft Sunday night with three astronauts heading to its space station, including one set to stay in space for a year.
China has launched the Shenzhou 23 spacecraft with three astronauts heading to its space station.
Elon Musk's SpaceX claimed a successful launch of its newest Starship variant on Friday evening, overcoming significant engine malfunctions to achieve its intended landing destination in the Indian Ocean. The test flight ended with a massive fireball as the spacecraft tipped into the water off Australia's western coast, an explosive finale the company said was expected to occur. The post Watch: SpaceX Test Flight Ends in Massive Fireball appeared first on Breitbart.
"I think there's plenty of fire lit under them already."
In the late 1940sโwhen computer engineers were grappling with unreliable hardware and noisy transmission environmentsโa team of engineers inside a modest lab at the University of Manchester, England, confronted a problem so fundamental that it threatened the viability of digital computing itself. Machines could generate bits, but they could not reliably read them back. The inconsistent reading back of memory data did not initially present itself as a grand theoretical challenge. It showed up as something more mundane: inconsistent computing results. Engineers including Frederic C. Williams, Tom Kilburn, and G. E. (Tommy) Thomas traced the failures not to logic errors but to the physical behavior of the machines themselves. The team devised a technique for keeping a transmitter and a receiver synchronized without relying on a separate clock signal. Their innovation, known as Manchester code or phase encoding, encoded each bit with a transition in the middle of the bit period, effectively embedding timing information directly into the data stream to be a self-clocking signal. So, even if the signal degraded or the timing drifted slightly, the receiver could continually keep time based on those regular transitions. By eliminating the need for separate clocks and reducing synchronization errors, Manchester code made data transfer more robust across cables and circuits. Those qualities later made it a natural fit for technologies such as Ethernet and early data storage systems. Its self-clocking nature helped standardize how machines communicate, and it laid the groundwork for modern networking and digital communication protocols. On 13 April 2026, this breakthrough was honored with an IEEE Milestone plaque during a ceremony at the University of Manchester. Dignitaries from IEEE and the university attended the ceremony. Embedding timing in signals Those 1940s Manchester University engineers were working on systems that fed into the Manchester Mark I, one of the first practical stored-program machines. When troubles arose, they used oscilloscopes to probe signals. They found that electrical pulses did not arrive with consistent timing. Memory signals also blurred over time, making them harder to read, and when long runs of identical bits occurred, the waveform flattened into stretches with no transitions. That led to a crucial insight: The problem was not just detecting whether a signal was high or low; the system also lost track of when to sample the signal. Without reliable timing markers, even correctly formed signals were misread. Bits could effectively be lost or miscounted because the system fell out of sync. At first, the engineers tried to tame the hardware. They experimented with stabilizing circuits and more consistent pulse generation, attempting to impose a regular rhythm on an inherently unstable system. But the fixes proved fragile, and the electronics of the day could not maintain the required precision. So the Manchester group took a different approach. If the hardware could not provide a dependable clock, the signal itself would have to carry one. Instead of representing data as static levels, each bit changed state, with a guaranteed transition in the middle. Embedding timing in the signal reduced erratic behavior. Machines were suddenly able to reliably transmit, store, and read back dataโan essential step toward practical stored-program computing. Making signals unmistakable The Manchester code addressed several issues at once. Regular transitions allowed continuous timing recovery. Transitions proved easier to detect than static levels, and long runs of identical bits no longer produced flat, ambiguous waveforms. Rather than fighting the imperfections of early electronics, the design worked with them. From lab curiosity to a global standard What began as a local solution in Manchester shaped digital communication systems for decades, including early Ethernet technology, for which timing and shared-medium communication were central challenges. According to Robert Metcalfe, a member of the team that built the first Ethernet system at Xerox PARC in 1973, he and his colleagues relied on Manchester code. โManchester code solved a fundamental problem for us: timing,โ Metcalfe says, explaining that each bit carried its own clock and removed the need for a global synchronized signal. That self-clocking property wasnโt the only benefit provided by the encoding scheme. On a shared coaxial cable, Manchester encoding did more than provide timing. Each transceiver left the medium undrivenโeffectively โoffโโmost of the time, allowing packets from other machines to pass without interference. Even during transmission, a station drove the signal only about half the time, leaving the line undriven during the other half of each bit cycle. This distinctionโbetween a driven signal and an undriven line, rather than simple 1s and 0sโallowed receivers to recover both data and clock timing while also monitoring the cable for other activity. If a transceiver detected a signal when it expected the line to be undriven, the signal indicated that another station was transmitting at the same time. In other words, the system could detect collisions in real time and respond accordingly. The idea has proven durable far beyond local networks. Manchester code is being used aboard the Voyager spacecraft, which are now cruising through interstellar spaceโunderscoring its reliability in extreme environments. The code also has found its way into everyday consumer electronics. Infrared remote controls for televisions and audio equipment commonly rely on Manchester code through protocols such as RC-5, developed by Philips in the early 1980s. The protocol encodes commands as timed infrared signals transmitted by a handsetโs integrated circuit and LED, allowing devices to reliably interpret button presses even through noise and signal distortion. Manufacturers across Europeโand many in the United Statesโadopted the approach, extending Manchester code into the home. Why the Milestone matters An IEEE Milestone designation recognizes technologies with enduring impact. Manchester code qualifies because it solved a foundational timing problem at a critical moment in computing history. Without a way to embed timing in the data itself, early digital systems would have remained fragile and unreliable. Manchester code helped transform them into dependable machines, and it enabled much of todayโs digital communication. โManchester code solved a fundamental problem for us: timing,โ โRobert Metcalfe, an Ethernet inventor Key participants at the plaque dedication ceremony included Tom Coughlin, 2024 IEEE president; Duncan Ivison, University of Manchester president and vice chancellor, and Nagham Saeed, chair of the IEEE U.K. and Ireland Section. Talks by Kees Schouhamer Immink (the 2017 IEEE Medal of Honor laureate probably best known for his work that made compact discs and other high-density digital media practical) and Peter Green (Manchesterโs deputy dean for the engineering faculty) highlighted the codeโs lasting impact on digital data storage and communications. The IEEE Milestone plaque for the Manchester code reads: โAt this site in 1948โ1949, Manchester code was invented for reliably encoding digital data stored on the Manchester Mark I computerโs magnetic drum. It became a standard for computer magnetic tapes and floppy disks and was used in digital communications, including the Voyager 1 and 2 spacecraft and early Ethernet networks. It found wide use in domestic remote controllers, radio frequency identification (RFID) tags, and many control network standards.โ Administered by the IEEE History Center and supported by donors, the Milestone program recognizes outstanding technical developments worldwide. The IEEE U.K. and Ireland Section sponsored the nomination.