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The Green Bank Telescope in West Virginia captured the Artemis II crew from roughly 213,000 miles (343,000 km) away, just prior to or following their record-setting lunar flyby.(Image credit: Main: GBO/NRAO; insert: JPL & NSF/AUI/NSF NRAO)Share this article 1Join the conversationFollow usAdd us as a preferred source on GoogleSubscribe to our newsletter
In recent times, we have been graced with some exceptionally remarkable photographs from NASA’s significant Artemis II mission, including a vast collection of 12,000 images taken by the astronauts. However, a recently unveiled, somewhat indistinct new snapshot, depicting the crewed Orion capsule as merely a cluster of monochrome pixels, is a strong contender for the most remarkable Artemis II photograph — owing to its capture by an Earth-based telescope situated over 200,000 miles (320,000 kilometers) distant.
This positions the newly released photograph as a candidate for the longest-distance image of humanity ever obtained from Earth. (Photographs like the iconic “Pale Blue Dot,” which originated from space, are not included in this consideration.)
The granular photograph displays the radio transmissions originating from Integrity as it executed a gravitational slingshot maneuver around the moon at an approximate velocity of 2,000 mph (3,200 km/h) — a speed comparable to a high-velocity projectile. The capsule, roughly the size of a recreational vehicle, was positioned approximately 213,000 miles (343,000 km) away at the moment the image was taken on April 6 (which corresponded to the sixth day of the mission’s flight). This means it was on the same hemisphere of the moon as Earth. Consequently, the photograph was captured either just before or just after the crew briefly vanished behind the moon’s far side, thereby setting a new record for the furthest distance ever traveled from our planet.
Initially, the photograph may not appear particularly striking. However, upon contemplating its subject matter and the sophisticated technology employed in its acquisition, its impressiveness becomes considerably more evident.
The newly released grainy photograph illustrates the radio emissions detected from Integrity. NRAO officials explained, “The vertical axis (representing range) denotes the spacecraft’s distance, with greater distances appearing lower in the image. The horizontal axis (representing Doppler shift) signifies a frequency alteration from the anticipated return signal.”
(Image credit: JPL & NSF/AUI/NSF NRAO)
“There are four individuals contained within those pixels,” remarked Will Armentrout, a GBT astronomer involved in tracking Artemis II, to his colleagues upon their initial viewing of the image, according to an NRAO statement.
These four individuals comprised mission commander Reid Wiseman, pilot Victor Glover, and mission specialist Christina Koch, all from NASA, along with mission specialist Jeremy Hansen representing the Canadian Space Agency. Each of them achieved distinct individual spaceflight records during this mission.
Tracking NASA’s return to the moon
The Artemis II astronauts embarked on their lunar journey on April 1, aboard NASA’s colossal Space Launch System rocket, and concluded their mission with a splashdown in the Pacific Ocean on April 10. Their reentry into Earth’s atmosphere occurred at approximately 25,000 mph (40,000 km/h), marking the fastest velocity ever attained by humans.
Astronauts Reid Wiseman (right), Victor Glover (bottom), Christina Koch (left), and Jeremy Hansen (top) journeyed further from Earth than any humans in history when they orbited the moon on April 6.
(Image credit: NASA)
Throughout the mission, space exploration enthusiasts followed the live broadcast from Earth, monitoring every event, from initial lavatory malfunctions and lunar meteor impacts to a poignant homage to Wiseman’s late wife and a somewhat awkward interview with President Donald Trump. However, they were not the sole observers.
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The GBT team was also diligently observing Artemis II, providing essential assistance in precisely tracking the crew’s trajectory during six-hour observation periods on each of the five days Integrity maintained its closest proximity to the moon. The telescope’s exceptional sensitivity and accuracy were instrumental in gathering critical data that will aid NASA in its preparations for future Artemis missions, which are aimed at establishing a lunar outpost.
“Utilizing the GBT, we were capable of tracking the spacecraft’s motion with a precision of 0.2 millimeters [0.008 inches] per second relative to NASA’s calculated projections,” stated Anthony Remijan, the GBT’s site director, in the announcement. “This is akin to having a speedometer in your vehicle that can measure your speed within a decimal accuracy of 0.0004 per hour.”
The Artemis II crew commenced their ascent from Florida’s Kennedy Space Center on April 1 and achieved touchdown off the coast of San Diego on April 10, having covered a cumulative distance of 695,000 miles (1.1 million km).
(Image credit: NASA/Bill Ingalls)
This serves as an excellent illustration of the collaborative efforts of scientific organizations worldwide in contributing to the mission’s success.
“To accomplish significant feats like those undertaken in this capsule … requires a robust support team,” stated Hansen during an interview conducted aboard Integrity.
Artemis II quiz: How well do you know NASA’s groundbreaking lunar mission?
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