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BQ 3A News > Blog > USA > 2 spacecraft flew precisely in line to mimic a sun eclipse, seize a shocking symbol and check new tech
USA

2 spacecraft flew precisely in line to mimic a sun eclipse, seize a shocking symbol and check new tech

August 4, 2025
2 spacecraft flew precisely in line to mimic a sun eclipse, seize a shocking symbol and check new tech
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All over a sun eclipse, astronomers who find out about heliophysics are ready to review the Solar’s corona – its outer surroundings – in tactics they’re not able to do at another time.

The brightest a part of the Solar is so brilliant that it blocks the faint gentle from the corona, so it’s invisible to lots of the tools astronomers use. The exception is when the Moon blocks the Solar, casting a shadow at the Earth all through an eclipse. However as an astronomer, I do know eclipses are uncommon, they remaining only some mins, and they’re visual most effective on slender paths around the Earth. So, researchers must paintings laborious to get their apparatus to the suitable position to seize those quick, rare occasions.

Of their quest to be informed extra in regards to the Solar, scientists on the Ecu House Company have constructed and introduced a brand new probe designed in particular to create synthetic eclipses.

Meet Proba-3

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This probe, known as Proba-3, works similar to an actual sun eclipse. One spacecraft, which is kind of round when considered from the entrance, orbits nearer to the Solar, and its activity is to dam the intense portions of the Solar, performing because the Moon would in an actual eclipse. It casts a shadow on a 2d probe that has a digicam able to photographing the ensuing synthetic eclipse.

The 2 spacecraft of Proba-3 fly in actual formation about 492 toes (150 meters) aside.
ESA-P. Carril, CC BY-NC-ND

Having two separate spacecraft flying independently however in this sort of method that one casts a shadow at the different is a difficult process. However long run missions rely on scientists working out easy methods to make this precision choreography era paintings, and so Proba-3 is a check.

This era helps to pave the best way for long run missions that might come with satellites that dock with and deorbit useless satellites or robust telescopes with tools situated a long way from their primary mirrors.

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The aspect receive advantages is that researchers get to observe via taking essential medical footage of the Solar’s corona, permitting them to be informed extra in regards to the Solar on the similar time.

An immense problem

The 2 satellites introduced in 2024 and entered orbits that means Earth as shut as 372 miles (600 kilometers) – that’s about 50% further from Earth than the Global House Station – and succeed in greater than 37,282 miles (60,000 km) at their maximum far away level, about one-sixth of learn how to the Moon.

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All over this orbit, the satellites transfer at speeds between 5,400 miles in step with hour (8,690 kilometers in step with hour) and 79,200 mph (127,460 kph). At their slowest, they’re nonetheless transferring rapid sufficient to move from New York Town to Philadelphia in a single minute.

Whilst flying at that velocity, they may be able to keep an eye on themselves routinely, with no human guiding them, and fly 492 toes (150 meters) aside – a separation this is longer than the period of a normal soccer stadium – whilst nonetheless retaining their places aligned to about one millimeter.

They had to deal with that actual flying trend for hours with a purpose to take an image of the Solar’s corona, and so they did it in June 2025.

The Proba-3 challenge could also be finding out house climate via watching high-energy debris that the Solar ejects out into house, once in a while within the course of the Earth. House climate reasons the aurora, often referred to as the northern lighting fixtures, on Earth.

Whilst the aurora is gorgeous, sun storms too can hurt Earth-orbiting satellites. The hope is that Proba-3 will lend a hand scientists continue to learn in regards to the Solar and higher are expecting bad house climate occasions in time to give protection to delicate satellites.

TAGGED:captureeclipseFlewimageImitatelinesolarspacecraftstunningTechtest
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