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Category: space – Page 485

JPL & the Space Age: To the Rescue

JPL & the Space Age: To the Rescue.

In 1990, Hubble meant trouble. The highly touted space telescope was designed to escape Earth’s blurry atmosphere to capture unparalleled visual images of the universe, but its creators were shocked to discover that a minuscule flaw rendered it nearsighted.

Enter NASA’s Jet Propulsion Laboratory scientists and engineers, who offered up an ingenious solution to Hubble’s visual woes. But would it work?

Hubble wasn’t the only space misadventure getting JPL’s attention during the 1990s: The Magellan spacecraft, nicknamed “Salvage 1” for its reliance on spare parts, barely survived its arrival at Venus. Galileo, destined for Jupiter, barely skirted failure when its main communications antenna refused to unfurl. And Mars Observer, the first mission to the Red Planet in nearly two decades, would mysteriously disappear just before going into orbit.

“To the Rescue” explores these iconic examples of the tireless effort and indomitable ingenuity of JPL engineers as they attempt to rescue the machines they had lofted into the heavens.

Continue reading “JPL & the Space Age: To the Rescue” | >

30 years after Intelsat VI rescue, Northrop Grumman aims to make in-space servicing a permanent reality

On 7 May 1992, Space Shuttle Endeavour lifted off on her first voyage at 23:40 UTC from Pad-B at the Kennedy Space Center in Florida. Her target: Intelsat VI F-3 (now known as Intelsat 603). The goal: rendezvous with, repair, and re-release the satellite.

In the now-30 years since that mission, on-orbit satellite repair and servicing have largely languished — save for the five Hubble servicing missions Endeavour and the Shuttle fleet would conduct after STS-49.

Northrop Grumman now aims to change that in 2024 when their new Mission Robotic Vehicle and Mission Extension Pods begin launching to perform on-orbit satellite servicing and repairs.

In Fake Universes, Evidence for String Theory

Circa 2015 o.o!

The publication of Green and Schwarz’s paper “was 30 years ago this month,” the string theorist and popular-science author Brian Greene wrote in Smithsonian Magazine in January, “making the moment ripe for taking stock: Is string theory revealing reality’s deep laws? Or, as some detractors have claimed, is it a mathematical mirage that has sidetracked a generation of physicists?” Greene had no answer, expressing doubt that string theory will “confront data” in his lifetime.

Recently, however, some string theorists have started developing a new tactic that gives them hope of someday answering these questions. Lacking traditional tests, they are seeking validation of string theory by a different route. Using a strange mathematical dictionary that translates between laws of gravity and those of quantum mechanics, the researchers have identified properties called “consistency conditions” that they say any theory combining quantum mechanics and gravity must meet. And in certain highly simplified imaginary worlds, they claim to have found evidence that the only consistent theories of “quantum gravity” involve strings.

According to many researchers, the work provides weak but concrete support for the decades-old suspicion that string theory may be the only mathematically consistent theory of quantum gravity capable of reproducing gravity’s known form on the scale of galaxies, stars and planets, as captured by Albert Einstein’s theory of general relativity. And if string theory is the only possible approach, then its proponents say it must be true — with or without physical evidence. String theory, by this account, is “the only game in town.”

Huzzah! The James Webb Is Fully Aligned and Ready to Spy on Deep Space

The stars are officially aligned for NASA’s James Webb Space Telescope.

The extremely expensive space observatory has finished its alignment phase, with scientists confirming that it’s almost ready to kick off official scientific operations later this year.

In other words, the $10 billion telescope is on the home stretch, nearing its biggest milestone yet. NASA also released a slew of stunning new sample images taken by the telescope, showing the Large Magellanic Cloud, a small satellite galaxy of our Milky Way — stunning previews, hopefully, for a slew of imagery we’ll see from the ‘scope.

Scientists discover bizarre ‘worm-like’ aurora stretching halfway across Mars

Nobody can explain why this ‘sinuous discrete aurora’ happened.

While scientists have detected discrete auroras above certain patches of the Red Planet before, never have they seen one on such a “massive scale,” the team said. The solar storm that propelled charged particles into the Martian atmosphere at a faster and more turbulent pace than usual is likely a key factor in this type of long, sinuous aurora, the researchers added.

Solar storm occurrences are predicted to increase over the next several years as the sun approaches its solar maximum — the period of greatest activity in the sun’s 11-year cycle — in 2025. The EMM’s Hope orbiter will continue watching for these newly discovered auroras in the meantime, while scientists dig into archival data collected by NASA and the European Space Agency to hunt for more examples of the snake-like streaks over Mars.