Connect with us


What NASA's James Webb Looks Like From Powerful Earth Telescopes – SciTechDaily



This artist’s conception shows the fully unfolded James Webb Space Telescope in space. Credit: Adriana Manrique Gutierrez, NASA Animator

The past month has been an exciting time for the James Webb Space Telescope! After launching on Christmas Day, the telescope spent the next few weeks deploying its mirrors, checking the individual segments, and then maneuvering to L2, where it will spend the next ten to twenty years unlocking the mysteries of the cosmos. According to NASA Administrator Bill Nelson and the Chief Science Communications Officer (CSCO) for the JWST, James Webb will begin collecting light this summer.

To mark the occasion, the Virtual Telescope Project (VTP) captured images of James Webb to give people a sense of what it looks like in orbit. Unfortunately, there’s not a lot to see there, other than a bright dot in the night sky. But like Carl Sagan’s famous “Pale Blue Dot” picture of Earth (taken by Voyager 1 on its way out of the Solar System), or Cassini’s “The Day Earth Smiled” image, there’s a tremendous amount of significance in that small point of light.

Webb Space Telescope Deployment Path

Credit: NASA

The VTP is an advanced astronomical service launched in 2006 by the Bellatrix Astronomical Observatory, located in Ceccano, Italy. The VTP operates two remotely-accessible robotic telescopes, the Planewave 17-inch g/6.8 (432/2939 mm) Corrected Dall-Kirkham Astrograph (aka. “Elena”), and the Celestron 14″-f/8.4 (356/3000 mm) Schmidt-Cassegrain OTA. They also offer public online observing sessions, live streams, expert commentary from their scientific staff, and public outreach to people worldwide.

The image of the JWST (shown below) was taken on January 24th using Elena. This robotic telescope tracked the apparent motion of the JWST automatically and acquired a single 300-single unfiltered exposure that shows the telescope’s position (indicated by an arrow in the center). When it was imaged, the JWST had reached its final destination (L2), placing it at a distance of about 1.4 million km (869,920 mi) from Earth.

James Webb Space Telescope From Earth

The James Webb Telescope imaged from Earth. – January 24th, 2022. Credit: TVTP 2.0

In addition to the above image, the VTP also created a short GIF animation (below) that shows the JWST’s apparent motion against the stars. While it may look like little more than a tiny dot against a background of brighter dots (and the darkness of space), these images tell a story of an ambitious mission that was decades in the making. Work began on the telescope in 1996, and it was initially hoped that the James Webb would be launched by 2007 and with a budget of $500 million.

Unfortunately, there were many delays and cost overruns due to a major redesign, issues with the sunshield, and the Ariane 5 rocket that would launch it. The COVID-19 pandemic also imposed delays, as did the fact that the James Webb is the most complex and advanced space telescope ever conceived. Time and again, the origami-like nature of the telescope (where it has to fold up to fit within a payload fairing) required extensive testing runs, and the slightest issues required retesting and safety checks.

James Webb Space Telescope From Earth

The James Webb Space Telescope in motion against the stars. January 24th, 2022. Credit: TVTP 2.0

By 2016, construction was finally finished, but an extensive testing program still had to be completed. By late 2021, the telescope testing finished up, and the James Webb was shipped to Kourou, French Guiana, for integration with the Ariane 5 rocket. When the launch finally happened on Christmas Day, it went off without a hitch. Thomas Zurbuchen, NASA’s associate administrator for science missions, commented, “It’s truly Christmas with all the presents and everything and we have a space mission!”

By 2016, construction was finally finished, but an extensive testing program still had to be completed. By late 2021, the telescope testing finished up, and the James Webb was shipped to Kourou, French Guiana, for integration with the Ariane 5 rocket. When the launch finally happened on Christmas Day, it went off without a hitch. NASA’s associate administrator for science missions Thomas Zurbuchen, “It’s truly Christmas with all the presents and everything and we have a space mission.”

Now that the mission is at L2, the mission team is waiting for the telescope to reach operational temperature. This will be followed by the activation of the telescope’s instruments, final testing, and calibration. Barring any issues, NASA anticipates that the James Webb will begin collecting its first light by June 2022. As NASA Administrator Bill Nelson said:

“Webb, welcome home! Congratulations to the team for all of their hard work ensuring Webb’s safe arrival at L2 today. We’re one step closer to uncovering the mysteries of the universe. And I can’t wait to see Webb’s first new views of the universe this summer!”

Originally published on Universe Today.

Adblock test (Why?)

Source link

Continue Reading


Facial Recognition—Now for Seals – Hakai Magazine



Article body copy

Have you ever looked at a seal and thought, Is that the same seal I saw yesterday? Well, there could soon be an app for that based on new seal facial recognition technology. Known as SealNet, this seal face-finding system was developed by a team of undergraduate students from Colgate University in New York.

Taking inspiration from other technology adapted for recognizing primates and bears, Krista Ingram, a biologist at Colgate University, led the students in developing software that uses deep learning and a convolutional neural network to tell one seal face from another. SealNet is tailored to identify the harbor seal, a species with a penchant for posing on coasts in haulouts.

The team had to train their software to identify seal faces. “I give it a photograph, it finds the face, [and] clips it to a standard size,” says Ingram. But then she and her students would manually identify the nose, the mouth, and the center of the eyes.

For the project, team members snapped more than 2,000 pictures of seals around Casco Bay, Maine, during a two-year period. They tested the software using 406 different seals and found that SealNet could correctly identify the seals’ faces 85 percent of the time. The team has since expanded its database to include around 1,500 seal faces. As the number of seals logged in the database goes up, so too should the accuracy of the identification, Ingram says.

The developers of SealNet trained a neural network to tell harbor seals apart using photos of 406 different seals. Photo courtesy of Birenbaum et al.

As with all tech, however, SealNet is not infallible. The software saw seal faces in other body parts, vegetation, and even rocks. In one case, Ingram and her students did a double take at the uncanny resemblance between a rock and a seal face. “[The rock] did look like a seal face,” Ingram says. “The darker parts were about the same distance as the eyes … so you can understand why the software found a face.” Consequently, she says it’s always best to manually check that seal faces identified by the software belong to a real seal.

Like a weary seal hauling itself onto a beach for an involuntary photo shoot, the question of why this is all necessary raises itself. Ingram believes SealNet could be a useful, noninvasive tool for researchers.

Of the world’s pinnipeds—a group that includes seals, walruses, and sea lions—harbor seals are considered the most widely dispersed. Yet knowledge gaps do exist. Other techniques to track seals, such as tagging and aerial monitoring, have their limitations and can be highly invasive or expensive.

Ingram points to site fidelity as an aspect of seal behavior that SealNet could shed more light on. The team’s trials indicated that some harbor seals return to the same haulout sites year after year. Other seals, however, such as two animals the team nicknamed Clove and Petal, appeared at two different sites together. Increasing scientists’ understanding of how seals move around could strengthen arguments for protecting specific areas, says Anders Galatius, an ecologist at Aarhus University in Denmark who was not involved in the project.

Galatius, who is responsible for monitoring Denmark’s seal populations, says the software “shows a lot of promise.” If the identification rates are improved, it could be paired with another photo identification method that identifies seals by distinctive markings on their pelage, he says.

In the future, after further testing, Ingram hopes to develop an app based on SealNet. The app, she says, could possibly allow citizen scientists to contribute to logging seal faces. The program could also be adapted for other pinnipeds and possibly even for cetaceans.

Adblock test (Why?)

Source link

Continue Reading


NASA launches nanosatellite in preparation for lunar 'Gateway' station – Yahoo News Canada



The rocket carrying the Capstone satellite lifts off. (NASA)

Nasa has launched a tiny CubeSat this week to test and orbit which will soon be used by Gateway, a lunar space station.

It’s all part of the space agency’s plan to put a woman on the moon by 2025.

The Cislunar Autonomous Positioning System Technology Operations and Navigation Experiment (Capstone) mission launched from New Zealand on Tuesday.

Jim Reuter, associate administrator for the Space Technology Mission Directorate, said: “Capstone is an example of how working with commercial partners is key for Nasa’s ambitious plans to explore the moon and beyond.

“We’re thrilled with a successful start to the mission and looking forward to what Capstone will do once it arrives at the Moon.”

Read more: Astronomers find closest black hole to Earth

The satellite is currently in low-Earth orbit, and it will take the spacecraft about four months to reach its targeted lunar orbit.

Capstone is attached to Rocket Lab’s Lunar Photon, an interplanetary third stage that will send it on its way to deep space.

Over the next six days, Photon’s engine will periodically ignite to accelerate it beyond low-Earth orbit, where Photon will release the CubeSat on a trajectory to the moon.

Capstone will then use its own propulsion and the sun’s gravity to navigate the rest of the way to the Moon.

The gravity-driven track will dramatically reduce the amount of fuel the CubeSat needs to get to the Moon.

Read more: There might once have been life on the moon

Bradley Cheetham, principal investigator for CAPSTONE and chief executive officer of Advanced Space, “Our team is now preparing for separation and initial acquisition for the spacecraft in six days.

“We have already learned a tremendous amount getting to this point, and we are passionate about the importance of returning humans to the Moon, this time to stay!”

At the moon, Capstone will enter an elongated orbit called a near rectilinear halo orbit, or NRHO.

Once in the NRHO, Capstone will fly within 1,000 miles of the moon’s north pole on its near pass and 43,500 miles from the south pole at its farthest.

It will repeat the cycle every six-and-a-half days and maintain this orbit for at least six months to study dynamics.

“Capstone is a pathfinder in many ways, and it will demonstrate several technology capabilities during its mission timeframe while navigating a never-before-flown orbit around the Moon,” said Elwood Agasid, project manager for Capstone at Nasa’s Ames Research Center in California’s Silicon Valley.

“Capstone is laying a foundation for Artemis, Gateway, and commercial support for future lunar operations.”

Nasa estimates the cost of the whole Artemis mission at $28bn.

It would be the first time people have walked on the moon since the last Apollo moon mission in 1972.

Just 12 people have walked on the moon – all men.

Nasa flew six manned missions to the surface of the moon, beginning with Neil Armstrong and Buzz Aldrin in July 1969, up to Gene Cernan and Jack Schmitt in December 1972.

The mission will use Nasa’s powerful new rocket, the Space Launch System (SLS), and the Orion spacecraft.

Watch: NASA launch paves way for moon orbit station

Adblock test (Why?)

Source link

Continue Reading


The year’s biggest and brightest supermoon will appear in July & here’s when you’ll … – Curiocity



Summer is here and with it? Sunshine – and some serious moonshine (of the visible variety, of course). This upcoming month, look up in anticipation of the biggest and brightest event of the year, the July Buck supermoon – which will hover over North America on July 13th.

Appearing 7% larger and lower in the sky, this particular event will be one well worth keeping an eye on when it rises above the horizon.

This will be the closest we’ll get to our celestial neighbour in 2022 (357,418 km) and while North America won’t get to see it when it reaches peak illumination at 2:38 pm ETC., it’ll still look pretty dang impressive after the sunsets.

Related Posts
You can stay in a spaceship Airbnb just a few hours from Seattle
Canada is gearing up to make crimes on the moon a thing

Not sure when the moon rises in your area? Here’s the earliest that you’ll be able to see the moon in various cities across the continent according to the Farmer’s Almanac.

  • Seattle, Washington  – 9:50 pm PDT
  • Vancouver, British Columbia – 10:02 pm PDT
  • Calgary, Alberta – 10:35 pm MST
  • Edmonton, Alberta – 10:49 pm MST
  • Toronto, Ontario – 9:34 pm MST
  • Montreal, Quebec – 9:18 pm MST

Until then, cross your fingers for a clear sky, friends! It’s going to be incredible.

Happy viewing.


When: Wednesday, July 13th

Adblock test (Why?)

Source link

Continue Reading