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James Webb Space Telescope marks 'exciting period' in space exploration, U of A space historian says – The Gateway Online

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A University of Alberta historian has been documenting every phase of the James Webb Space Telescope for 22 years, and continues to follow it now that the the spacecraft has reached its final destination in space.

Robert Smith, professor of history in the department of history, classics, and religion, has spent the past four decades chronicling the development of NASA’s Hubble Space Telescope and James Webb Space Telescope. The James Webb Space Telescope, which has now reached its final destination in space, will be the subject of Smith’s upcoming book — which he expects to release late next year.

Smith’s book will cover the making of the telescope, along with early scientific results collected from the spacecraft.

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“With the James Webb Space Telescope, I started following the telescope in about 2002 when serious work [on it] began,” Smith said. “With any luck, in a few months time there will be scientific results secured from the James Webb Space Telescope… so one of the major themes for the latter section of the book will be how scientific observations that have actually been made matched up with what people have expected [the telescope] to be doing.”

This book is likely his last on a space telescope, due to the sizeable scale of such projects.

Supplied Robert Smith, professor of history in the department of history, classics, and religion at the U of A.

Smith has been documenting space history for the majority of his career. After completing the equivalency of a master’s degree in applied mathematics and theoretical physics, the history of science sparked his interest.

“At that point, I switched and I worked on really the history of astronomy in the early 20th century,” he explained. “‘Are there other galaxies in space besides our Milky Way galaxy’ and ‘is the universe expanding’ were the types of subjects of my PhD dissertation. From there I got interested in the development of telescopes.”

This lead Smith to working at the National Air and Space Museum in Washington, D.C. for 15 years, where he was involved in the Space Telescope History Project. This project introduced him working with space telescopes.

“I became fascinated with these kinds of very large-scale projects involving interactions between science, technology, politics, and trying to establish how a project in somebody’s head actually moves forward and leads to an operating telescope or operating observatory,” he said.

“So my route into space came via the astronomy and the tools that astronomers were developing to pursue astronomy. And because you can do a lot of fun space [research] with telescopes… I became extremely interested in space telescopes.”

Smith described the work being done with the James Webb Space Telescope as an exciting period for space exploration.

“It is an exciting period, because one of the lessons of the history of astronomy is when a big new telescope is built, [a telescope that] is more powerful in certain ways than any telescope that has been built before, new things are found,” Smith said. “So you can have what is called the conscious expectation of the unexpected — you don’t know what you’re going to find necessarily, but you expect to find new stuff.”

For students interested in space history and exploration Smith recommended checking out the courses he is teaching at the U of A, and taking advantage of the historical literature currently available on the subject.

“There’s a lot of really interesting books that are available that people can read — when I started off in the 1980s there was much less solid historical literature available than is the case now,” he said. “So if anybody is interested, they’re welcome to send me an email; I can write back with some suggestions of further reading that they might like to pursue if they want to get themselves up to speed.”

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SpaceX sends 23 Starlink satellites into low-Earth orbit – UPI News

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April 23 (UPI) — SpaceX launched 23 Starlink satellites into low-Earth orbit Tuesday evening from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida.

Liftoff occurred at 6:17 EDT with a SpaceX Falcon 9 rocket sending the payload of 23 Starlink satellites into orbit.

The Falcon 9 rocket’s first-stage booster landed on an autonomous drone ship in the Atlantic Ocean after separating from the rocket’s second stage and its payload.

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The entire mission was scheduled to take about an hour and 5 minutes to complete from launch to satellite deployment.

The mission was the ninth flight for the first-stage booster that previously completed five Starlink satellite-deployment missions and three other missions.

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NASA Celebrates As 1977’s Voyager 1 Phones Home At Last

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Voyager 1 has finally returned usable data to NASA from outside the solar system after five months offline.

Launched in 1977 and now in its 46th year, the probe has been suffering from communication issues since November 14. The same thing also happened in 2022. However, this week, NASA said that engineers were finally able to get usable data about the health and status of its onboard engineering systems.

Slow Work

Fixing Voyager 1 has been slow work. It’s currently over 15 billion miles (24 billion kilometers) from Earth, which means a radio message takes about 22.5 hours to reach it—and the same again to receive an answer.

The problem appears to have been its flight data subsystem, one of one of the spacecraft’s three onboard computers. Its job is to package the science and engineering data before it’s sent to Earth. Since the computer chip that stores its memory and some of its code is broken, engineers had to re-insert that code into a new location.

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Next up for engineers at NASA’s Jet Propulsion Laboratory in California is to adjust other parts of the FDS software so Voyager 1 can return to sending science data.

Beyond The ‘Heliopause’

The longest-running and most distant spacecraft in history, Voyager 1, was launched on September 5, 1977, while its twin spacecraft, Voyager 2, was launched a little earlier on August 20, 1977. Voyager 2—now 12 billion miles away and traveling more slowly—continues to operate normally.

Both are now beyond what astronomers call the heliopause—a protective bubble of particles and magnetic fields created by the sun, which is thought to represent the sun’s farthest influence. Voyager 1 got to the heliopause in 2012 and Voyager 2 in 2018.

Pale Blue Dot

Since their launch from Cape Canaveral, Florida, aboard Titan-Centaur rockets, Voyager 1 and Voyager 2 have had glittering careers. Both photographed Jupiter and Saturn in 1979 and 1980 before going their separate ways. Voyager 1 could have visited Pluto, but that was sacrificed so scientists could get images of Saturn’s moon, Titan, a maneuver that made it impossible for it to reach any other body in the solar system. Meanwhile, Voyager 2 took slingshots around the planets to also image Uranus in 1986 and Neptune in 1989—the only spacecraft ever to image the two outer planets.

On February 14, 1990, when 3.7 billion miles from Earth, Voyager 1 turned its cameras back towards the sun and took an image that included our planet as “a mote of dust suspended in a sunbeam.” Known as the “Pale Blue Dot,” it’s one of the most famous photos ever taken. It was remastered in 2019.

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NASA hears from Voyager 1, the most distant spacecraft from Earth, after months of quiet

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CAPE CANAVERAL, Fla. (AP) – NASA has finally heard back from Voyager 1 again in a way that makes sense.

The most distant spacecraft from Earth stopped sending back understandable data last November. Flight controllers traced the blank communication to a bad computer chip and rearranged the spacecraft’s coding to work around the trouble.

NASA’s Jet Propulsion Laboratory in Southern California declared success after receiving good engineering updates late last week. The team is still working to restore transmission of the science data.

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It takes 22 1/2 hours to send a signal to Voyager 1, more than 15 billion miles (24 billion kilometers) away in interstellar space. The signal travel time is double that for a round trip.

Contact was never lost, rather it was like making a phone call where you can’t hear the person on the other end, a JPL spokeswoman said Tuesday.

Launched in 1977 to study Jupiter and Saturn, Voyager 1 has been exploring interstellar space – the space between star systems – since 2012. Its twin, Voyager 2, is 12.6 billion miles (20 billion kilometers) away and still working fine.

 

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