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The Image of the Milky Way
Euclid’s picture has captured over 60 million stars, in addition to nebulae and star clusters, discovered on the centre of the galaxy – a densely populated area that is a perfect place to seek for exoplanets by way of gravitational microlensing.
“[For scientists] to detect microlensing, it is necessary to observe portions of the sky crowded with stars, such as those near the centre of our galaxy, ” defined Jean-Philippe Beaulieu, the lead researcher of the observation campaign. “Over the past 20 years, nearly 300 exoplanets have been discovered using this technique, all with ground-based telescopes and all in the direction of the centre of our galaxy. This image from Euclid includes 51 known planetary systems and will contribute to the study of many others that will be identified.”
Measuring Planetary Masses
Although detecting a microlensing occasion takes a number of weeks – which implies no new ones had been recognized throughout Euclid’s quick timeframe of few hours – what makes this picture necessary is that it supplies the information wanted to measure the plenty of already recognized planets, in addition to these of but to be found.
“In 24 hours, Euclid has already captured the stars involved in all future microlensing events that the Roman Space Telescope will detect – but before the stars and planets involved have aligned, ” stated Natalia Rektsini, who led the information launch. “This means that anyone who detects a microlensing event in the same region – for example, with Roman – will now be able to use Euclid’s data as a temporal reference in the past and see what the stars looked like before they overlapped,” she defined.
Essentially, Euclid’s information will function a reference archive for future missions and can allow the research of exoplanets and their plenty.
“Euclid has provided unique data on the centre of the Milky Way, offering a broad and clear view of this region,” stated Valeria Pettorino, scientific lead for the Euclid undertaking at ESA. “This data can also be used for other scientific applications, ranging from brown dwarfs and binary stars to stellar motions and dust within our galaxy.”
This story initially appeared on WIRED Italia and has been translated from Italian.
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