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Related Concept Videos

Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

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In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
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In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. His first law states that all planets orbit the Sun in an elliptical orbit, with the Sun at one of the ellipse's foci. Therefore, the distance of a planet from the Sun varies throughout its revolution around the Sun.
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Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
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In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. In 1909, he formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe. However, in 1918, he published his third law of planetary motion, which gives a precise mathematical relationship between a planet's average distance from the Sun and the amount of time it takes to revolve around the Sun. It...
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Updated: Sep 20, 2025

Simulation of the Planetary Interior Differentiation Processes in the Laboratory
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Exploring the link between star and planet formation with Ariel.

Diego Turrini1,2, Claudio Codella3, Camilla Danielski4

  • 1Institute of Space Astrophysics and Planetology INAF-IAPS, Via Fosso del Cavaliere 100, I-00133 Rome, Italy.

Experimental Astronomy
|June 8, 2022
PubMed
Summary

The Ariel space mission will study transiting exoplanet atmospheres to understand planet formation. By observing diverse planets and stars, Ariel will reveal how planetary and stellar environments shape atmospheric composition.

Keywords:
ArielGalactic environmentPlanet formationProtoplanetary discsStar formationStellar characterization

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Area of Science:

  • Exoplanetary Science
  • Astrophysics
  • Planetary Science

Background:

  • Planetary bulk and atmospheric compositions offer insights into planet formation processes.
  • Environmental and evolutionary factors significantly influence final atmospheric composition.

Purpose of the Study:

  • To observe a diverse population of transiting exoplanets around various host star types.
  • To collect data on exoplanet atmospheric composition.
  • To advance the understanding of planet formation in our Galaxy.

Main Methods:

  • Observing transiting exoplanets using the Ariel space mission.
  • Analyzing atmospheric composition data.
  • Correlating atmospheric composition with host star types and planetary characteristics.

Main Results:

  • Ariel's observations will provide a wealth of data on exoplanet atmospheres.
  • The mission is optimally suited to address the complexity of factors shaping atmospheric composition.

Conclusions:

  • Understanding exoplanet atmospheric composition is key to understanding planet formation.
  • The Ariel mission will significantly contribute to exoplanetary science by providing unprecedented data.