The Royal Astronomical Society of Canada is compiling a guide to how hundreds of cultures used the stars with the World Asterisms Project.
Led by RASC first vice-president Charles Ennis, nearly 6,000 asterisms from more than 400 cultures had been recorded when he was interviewed in February. Smaller guides for specific cultures have been published, but the RASC guide spans continents.
“It’s a massive undertaking but what we’re trying to do is let people know there are other views out there,” Ennis said.
The project launched in June 2021 with the goal of celebrating the world’s sky cultures. A handbook will be available on the RASC website this year. It will be updated as new discoveries are made.
These asterisms are key to understanding our past, Ennis argued. The project records how different civilizations have used asterisms as calendars, navigational aids or harvesting schedules. There are epic battles, divine judgements, heroes, villains and ancestors.
“The sky reflects the Earth. People put their calendar in the sky. Your ancestors, your gods and the things symbolizing your culture are up there,” Ennis said. “There were all kinds of things people used the sky for that they now use their cell phone for.”
Many patterns do not use the connect-the-dot format of modern constellations. In the skies above ancient China, for instance, star clusters tell stories and each star is a character. Some cultures use dark patches of the Milky Way and others pay attention to how stars flicker.
There is a sense of urgency to the project. The legacies of colonialism means written records of asterisms for different civilizations are rare.
The number of people with generational knowledge is shrinking. Ennis said finding African astronomers and experts to contribute to the project has been hard, but in Australia research teams are studying the asterisms of dozens of Indigenous peoples.
“We would prefer that people from their own cultures represent their skies,” he said. “It’s a matter of trying to track down Elders or remembering the stories of Elders so you can reassemble these things.”
Another hurdle is progress. Light pollution is turning the night sky into a purple-orange haze in many cities. In places where stars are still clear, space junk and an increasing flood of satellites crowd the sky.
“We cannot go back to some golden age where everyone saw the same night sky, because that has never happened and it never will. You might look at a pattern and say ‘that looks like the Big Dipper,’ but if you’re Basque that’s the shepherd,” said Ennis. “This might be a way to get people to know there’s more than one way to see things, and to start looking up again and decide they should be able to see the night sky again.”
This World Asterisms Project, which includes more than 8,600 asterisms from 400 cultures, is a living project celebrating sky cultures. Published by The Royal Astronomical Society of Canada, it continues to grow as the process of naming stars continues and as ethnoastronomers and researchers investigate old records, interview elders and recover previously lost sky culture information.
Rocket Lab’s CAPSTONE mission to the moon is key to establishing a lunar space station – TechCrunch
It may look like Rocket Lab is just launching a microwave-sized hunk of metal to the moon — but it’s crucial for our future in space
“Going to the moon is no joke.” So said Rocket Lab CEO Peter Beck, just days before the planned launch of CAPSTONE, a watershed mission for both NASA and the private space industry.
The mission is important, though you might not assume so based on the stats of the CAPSTONE CubeSat on its own: It’s about the size of a microwave oven and weighs in at just 55 pounds. But the end goal of the spacecraft’s roughly six-month stint in lunar orbit is to chart a favorable trajectory for a crewed station that will orbit the moon. Once established, that platform, dubbed Gateway, could unlock a whole new chapter in human space exploration.
Consider CAPSTONE (which stands for Cislunar Autonomous Positioning System Technology Operations and Navigation Experiment) the first in-space step in NASA’s Artemis program, an ambitious plan to return humans to the moon by the middle of this decade. The Gateway platform could be used as a way station for lunar landers, a resupply junction for astronauts exploring the moon — or even a transfer point for missions to Mars and beyond.
The mission isn’t just a big deal for the Artemis program and public space exploration: Notably, it’s the result of a patchwork of collaboration between private industry and the space agency. The list of partners on NASA’s website for the mission includes:
And, of course, Rocket Lab for the launch services.
CAPSTONE is launching aboard a Rocket Lab Electron rocket from the company’s site on New Zealand’s remote Māhia Peninsula. “This is the highest mass and the highest performance Electron has ever had to fly by quite some margin,” Beck said. “The vehicle is absolutely stretched to its limits with respect to performance.”
In addition to actually launching the mission, Rocket Lab developed a special variant of its Photon spacecraft for this endeavor, which it’s calling the Lunar Photon. That spacecraft will conduct a series of orbits over a period of around six to eight days, increasing the velocity and apogee of the orbit over time. Then, Photon will perform the final burn, called the trans-lunar injection, which will set it on its course to the moon. Around 20 minutes after the injection, Photon and CAPSTONE will separate and the CubeSat alone will conduct the remaining maneuvers to reach its target orbit around the moon.
“The moon is a long way away,” Beck said, referring to the complexities of Photon’s maneuvers. “You’re traveling at huge velocities. So it only takes a smallest fraction of an angle error or a velocity error, and you just shoot way past where you need to be.”
“It’s like firing a bullet millions of kilometers, and it’s got to be exactly in the right place.”
An unusual orbit
The exact orbit that CAPSTONE will be exploring is called a near-rectilinear halo orbit (NRHO). That orbit, in the shape of a necklace, will bring CAPSTONE as close as 1,000 miles to the moon’s surface and as far away as 40,000 miles. Although the shape is odd, it’s a very stable orbit, which means greater efficiency and less use of propellant. NRHO was up against competing orbits, including low lunar orbit and distant retrograde orbit, as the ideal trajectory for Gateway; but as NASA explains, NRHO is a “best of both worlds” option that’ll provide astronauts with easy access to the lunar surface, a continuous line of sight to (and communication with) Earth and access to deep space.
But testing the NRHO orbit is not the only point of the mission. The CubeSat will also help NASA understand navigation, or how to generate an accurate estimation of Gateway’s trajectory, and station-keeping.
“Because the NRHO is marginally stable, Gateway and CAPSTONE will both require a gentle ‘nudge’ about once a week to stay in orbit,” Ethan Kayser, CAPSTONE mission design lead at Advanced Space, explained in a Reddit post. “CAPSTONE will be using the same strategy to design and execute these stationkeeping maneuvers, which occur once each revolution.” The eight propulsion thrusters built by Stella Exploration will be key to conducting these maneuvers.
CAPSTONE will arrive at its lunar orbit on November 13. After a roughly six-month orbital mission, NASA plans to crash the spacecraft into the moon at the end of its life. The launch is set to take place during an instantaneous launch window at 5:55 AM EDT on Tuesday, June 28, so be sure to follow TechCrunch for live coverage and reporting on the outocome of the mission launch.
See A Jaw-Dropping Crescent Moon, 50 Meteors And Hour And Our Billion-Star Milky Way: What You Can See In The Night Sky This Week – Forbes
Each Monday I pick out the northern hemisphere’s celestial highlights (mid-northern latitudes) for the week ahead, but be sure to check my main feed for more in-depth articles on stargazing, astronomy, eclipses and more.
What To See In The Night Sky This Week: June 27-July 3, 2022
It’s not easy going stargazing in summer at this time of year in the northern hemisphere. The nights are just so short. The best reason to stay up late and go somewhere dark is the sight of the spiral arms of our Milky Way galaxy arcing across the night sky. Look to the southeast and south for that this month—and this week in particular, which will be largely moonless.
When our satellite does emerge from its New Moon conjunction with the Sun expect lush views of a slender crescent Moon. Who said summer was no good for stargazing?
Monday, June 27, 2022: Boötids meteor shower and a crescent Moon meets Mercury
The June Boötids meteor shower—occasionally called the June Draconids or Boötid-Draconids meteor shower—runs annually between June 22 and July 2, but peaks in the early hours of June 27, 2020.
If you are out stargazing late tonight keep an eye out for the 50 or so “shooting stars” per hour expected. The shower’s radiant point—the apparent source of the shooting stars—is the constellation of Boötes.
If you’re still up before dawn you might just catch the planet Mercury just 3.9º from an incredibly slender 2.6% crescent Moon, but be very careful if you use binoculars to help you because the rising Sun is NOT something you want in your field of view.
Tuesday, June 30, 2022: A super-slim crescent Moon and ‘Asteroid Day’
Today is Asteroid Day. With any luck there won’t be anything to see hurtling towards (or even smashing into) our planet, but it’s a good chance to consider the threat posed to Earth of incoming space rocks. What’s really going to change everything is the Vera Rubin Observatory, which from 2022 will deploy a wide-angle camera to map the night sky in real-time—and identify many thousands of hitherto unfound asteroids.
Friday, July 1, 2022: ‘Earthshine’ on a crescent Moon
You should get a much clearer view of a crescent Moon today. Now 8% illuminated, in a clear sky it will be a stunning sight, not least because you’ll be able to see sunlight being reflected onto the Moon by the Earth as “Earthshine” or “planet-shine.” It’s a subtle sight, but once seen cannot be unseen; look at the Moon’s darkened limb with your eyes, or better still, with a pair of binoculars, to appreciate this fine sight.
As a bonus it will be just 3.5° from the Beehive Cluster, though you’ll need a pair of binoculars to see its 30 or so easily visible stars.
Saturday, July 2, 2022: ‘Earthshine’ on a crescent Moon and Regulus
Tonight just after sunset look west for a 14% crescent Moon, once again displaying Earthshine. The stars around it will be those of the “sickle” in the constellation of Leo. The brightest, about 5º left of the Moon, will be Leo’s brightest star, Regulus. It’s one of the brightest stars in the night sky and about 78 light-years distant.
Object of the week: noctilucent clouds
This time of year the twilight seems to last forever at northerly latitudes so consider looking for a “ghostly” display of noctilucent or “night shining” clouds (NLCs). At their best in northern twilight skies during June and July (at latitudes between 50° and 70° north and south of the equator), NLCs are very delicate high altitude clouds of icy dust that form about 50 miles/80 kilometres up. Because the Sun is never too far below the horizon at these latitudes they get subtly lit up for a short time. They’re best seen with the naked eye or a pair of binoculars.
Wishing you clear skies and wide eyes.
Astronomers Found a Crater From The Mystery Rocket That Smashed Into The Moon – ScienceAlert
The Lunar Reconnaissance Orbiter (LRO) – NASA’s eye-in-the-sky in orbit around the Moon – has found the crash site of the mystery rocket booster that slammed into the far side of the Moon back on 4 March 2022.
The LRO images, taken May 25th, revealed not just a single crater, but a double crater formed by the rocket’s impact, posing a new mystery for astronomers to unravel.
Why a double crater? While somewhat unusual – none of the Apollo S-IVBs that hit the Moon created double craters – they’re not impossible to create, especially if an object hits at a low angle. But that doesn’t seem to be the case here.
Astronomer Bill Gray, who first discovered the object and predicted its lunar demise back in January, explains that the booster “came in at about 15 degrees from vertical. So that’s not the explanation for this one.”
The impact site consists of an 18-meter-wide eastern crater superimposed on a 16-meter-wide western crater. Mark Robinson, Principal Investigator of the LRO Camera team, proposes that this double crater formation might result from an object with distinct, large masses at each end.
“Typically a spent rocket has mass concentrated at the motor end; the rest of the rocket stage mainly consists of an empty fuel tank. Since the origin of the rocket body remains uncertain, the double nature of the crater may help to indicate its identity,” he said.
So what is it?
It’s a long story. The unidentified rocket first came to astronomers’ attention earlier this year when it was identified as a SpaceX upper stage, which had launched NASA’s Deep Space Climate Observatory (DSCOVR) to the Sun-Earth L1 Lagrange Point in 2015.
Gray, who designs software that tracks space debris, was alerted to the object when his software pinged an error. He told The Washington Post on January 26 that “my software complained because it couldn’t project the orbit past March 4, and it couldn’t do it because the rocket had hit the Moon.”
Gray spread the word, and the story made the rounds in late January – but a few weeks later, he received an email from Jon Giorgini at the Jet Propulsion Lab (JPL).
Giorgini pointed out that DSCOVR’s trajectory shouldn’t have taken the booster anywhere near the Moon. In an effort to reconcile the conflicting trajectories, Gray began to dig back into his data, where he discovered that he had misidentified the DSCOVR booster way back in 2015.
SpaceX wasn’t the culprit after all. But there was definitely still an object hurtling towards the Moon. So what was it?
A bit of detective work led Gray to determine it was actually the upper stage of China’s Chang’e 5-T1 mission, a 2014 technology demonstration mission that lay the groundwork for Chang’e 5, which successfully returned a lunar sample to Earth in 2020 (incidentally, China recently announced it would follow up this sample return mission with a more ambitious Mars sample return project later this decade).
Jonathan McDowell offered some corroborating evidence that seemed to bolster this new theory for the object’s identity.
The mystery was solved.
Except, days later, China’s Foreign Minister claimed it was not their booster: it had deorbited and crashed into the ocean shortly after launch.
As it stands now, Gray remains convinced it was the Change 5-T1 booster that hit the Moon, proposing that the Foreign Minister made an honest mistake, confusing Chang’e 5-T1 with the similarly named Chang’e 5 (whose booster did indeed sink into the ocean).
As for the new double crater on the Moon, the fact that the LRO team was able to find the impact site so quickly is an impressive feat in itself. It was discovered mere months after impact, with a little help from Gray and JPL, who each independently narrowed the search area down to a few dozen kilometers.
For comparison, The Apollo 16 S-IVB impact site took more than six years of careful searching to find.
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