New space mission to chase down comet will be led by UK scientists

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A new mission called Comet Interceptor, which was proposed by the UK, has been targeted for launch by the European Space Agency in 2028.

Comet Interceptor would be the first mission to travel to a comet which has never previously encountered the inner Solar System.

To do this, it will need to launch and reach a holding position around 1.5 million miles away from Earth. There it will lie in wait until astronomers on the ground spot a suitable comet for it to intercept.

Scientists will then choose to target either a pristine comet travelling inward from the far reaches of our Solar System for the first time, or an interstellar object similar to Oumuamua – the cigar-shaped asteroid which passed through the Solar System last year – both untouched by the effects of the Sun.

This makes them scientifically important as ‘time capsules’ which offer an opportunity to study the conditions of the early Solar System and understand its formation.

The Comet Interceptor mission will involve a main spacecraft – a ‘mothership’ – that will make observations of the comet from a distance. It will deploy two smaller ‘daughter’ spacecraft which then move in closer to measure features such as the comet’s structure and surface material, as well as the cocktail of gases it is releasing.

The European Space Agency Science Programme Committee has selected the project as the first in a new class of ‘Fast’ missions, which use existing, flight-proven technology to speed up the journey from mission concept to implementation.

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