Astronomers have found a "very special" solar system with six planets that are locked in a strange rhythm.
The worlds move around their central stars in resonance, locked in a rhythmic dance as they move around their orbits.
As well as representing a glimpse at a very unusual planetary system, researchers hope that the set of worlds – moving around a star known as TOI-178, some 200 lightyears away – could shed light on how planets including those in our solar system are born and evolve.
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TRAPPIST-1 Exoplanets Solar System Comparison – Exoplanet Exploration: Planets Beyond our Solar
This graph presents measured properties of the seven TRAPPIST-1 exoplanets (labeled b through h), showing how they stack up with one another as well as with Earth and the other inner rocky worlds in our own solar system. The relative sizes of the planets are indicated by the circles. All of the known TRAPPIST-1 planets are larger than Mars, with five of them within 15% of the diameter of Earth.
The vertical axis shows the uncompressed densities of the planets. Density, calculated from a planet’s mass and volume, is the first important step in understanding its composition. Uncompressed density takes into account that the larger a planet is, the more its own gravity will pack the planet’s material together and increase its density. Uncompressed density, therefore, usually provides a better means of comparing the composition of planets.
Solar System Formation in Two Steps – Explains Composition and Features of Planets, Asteroids and
The inner terrestrial protoplanets accrete early, inherit a substantial amount of radioactive 26Al, and hence melt, form iron cores, and degas their primordial volatile abundances rapidly. The outer Solar System planets start to accrete later and further out with less radiogenic heating, and hence retain the majority of their initially accreted volatiles. Credit: Mark A Garlick/markgarlick.com
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The suggested combination of astrophysical and geophysical phenomena during the earliest formation phase of the Sun and the Solar System itself can explain why the inner Solar System planets are small and dry with little water by mass, while the outer Solar System planets are larger and wet with lots of water. It explains the meteorite record by forming planets in two distinct steps.
Oldest carbonates in the solar system | EurekAlert! Science News
IMAGE: Flensburg meteorite with black fusion crust: Parts of the fusion crust were lost during the flight through the atmosphere. The small fragment, weighing 24,5 grams, is about 4.5 billion years... view more
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A meteorite that fell in northern Germany in 2019 contains carbonates which are among the oldest in the solar system; it also evidences the earliest presence of liquid water on a minor planet. The high-resolution Ion Probe - a research instrument at the Institute of Earth Sciences at Heidelberg University - provided the measurements. The investigation by the Cosmochemistry Research Group led by Prof.
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Karakul Lake in Tajikistan formed inside a meteorite impact crater. Credit: USGS/NASA Landsat/Orbital Horizon/Gallo Images/Getty
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On the afternoon of 13 December 1795, three ploughmen in Yorkshire saw something astonishing. A stone plummeted from the sky and buried itself deep into the ground near the village of Wold Newton. Neighbours came running at what sounded like pistol fire. In the earth, they found a warm stone about the size of a loaf of bread.
NASA's Roman Mission Will Probe Galaxy's Core for Hot Jupiters, Brown Dwarfs – Exoplanet
When it launches in the mid-2020s, NASA’s Nancy Grace Roman Space Telescope will explore an expansive range of infrared astrophysics topics. One eagerly anticipated survey will use a gravitational effect called microlensing to reveal thousands of worlds that are similar to the planets in our solar system.
“We were thrilled to discover that Roman will be able to offer even more information about the planets throughout our galaxy than originally planned,” said Shota Miyazaki, a graduate student at Osaka University in Japan who led the study. “It will be very exciting to learn more about a new, unstudied batch of worlds.”
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