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Journalism of Courage
Stunning images captured using the European Southern Observatory’s (ESO) Very Large Telescope in Chile gave scientists new insights into the complex process of planet formation. ESO on Wednesday released the images, along with the publication of several studies.
“This is really a shift in our field of study. We’ve gone from the intense study of individual star systems to this huge overview of entire star-forming regions,” said Christian Ginski, lead author of one of three new papers published in the journal Astronomy & Astrophysics, in a press statement.
Researchers observed a total of 86 stars across three different star-forming regions within our galaxy — Taurus, Chamaeleon I, and Orion. Taurus and Chamaeleon I are both about 600 light-years away from our planet while Orion is a gas-rich cloud about 1,600 light-year away. They found that planet-forming discs also have extraordinary diversity, just like their mature counterparts.
“Some of these discs show huge spiral arms, presumably driven by the intricate ballet of orbiting planets. Others show rings and large cavities carved out by forming planets, while yet others seem smooth and almost dormant among all this bustle of activity,” added Ginski.
Among the many revelations they found was the fact that in Orion, many stars in groups of two or more were less likely to have large planet-forming discs. This is quite important since most stars in our galaxy have companions, unlike the Sun, according to ESO. Also, the uneven appearance of discs in the region points towards the possibility of massive planets being present within them, which could cause discs to warp and become misaligned.
