Scientists have captured the
first direct image of a solar system that closely resembles our own. The new
image is a family portrait of sorts, showing two giant exoplanets orbiting a
young, sun-like star, roughly 300 light years away.
The picture was taken using the
European Southern Observatory's Very Large Telescope, located in Chile's
Atacama Desert. According to a new study in the Astrophysical Journal Letters,
the system will help astronomers better understand how our solar system formed
and evolved
The star, known as TYC 8998-760-1
and located in the Southern constellation of Musca, is only 17 million years
old, which researchers called a "very young version of our own sun."
Comparatively, the sun is roughly 4.6 billion years old.
Both planets orbiting the star,
dubbed TYC 8998-760-1b and TYC 8998-760-1c, are suspected to be gas giants,
meaning they are composed primarily of gases like helium and hydrogen. However,
they are much further away from their host star than our gas giants Jupiter and
Saturn, at distances of 160 and about 320 times the Earth-sun distance. They
are also much heavier than the gas giants in our solar system.
The image shows the two planets,
which appear as two bright points of light, distantly orbiting their parent
star, located in the upper left corner. Because they formed so recently, they
still glow brightly enough to be seen from Earth. This image, captured by the
SPHERE instrument on ESO's Very Large Telescope, shows the star TYC 8998-760-1
accompanied by two giant exoplanets. ESO/BOHN ET AL.
It marks the first time
astronomers have observed more than a single planet orbiting a star similar to
the sun. Only two similar systems have ever been previously observed — both
with stars uniquely different to ours.
"This discovery is a
snapshot of an environment that is very similar to our Solar System, but at a
much earlier stage of its evolution," lead researcher Alexander Bohn, a
PhD student at Leiden University in the Netherlands, said in a press release.
Co-author Matthew Kenworthy, an
associate professor at Leiden University, said that these kinds of direct
observations are crucial in the hunt for planets that can support life.
"Even though astronomers have indirectly detected thousands of planets in
our galaxy, only a tiny fraction of these exoplanets have been directly
imaged," he said.
Only a few dozen of the
exoplanets so-far discovered have been directly imaged, according to NASA.
Scientists hope that further research will reveal if the young planets formed
at their current location or migrated from somewhere else — and how they might
interact with each other.