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関連する概念動画

Kepler's Second Law of Planetary Motion01:29

Kepler's Second Law of Planetary Motion

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.
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
Kepler's Third Law of Planetary Motion01:18

Kepler's Third Law of Planetary Motion

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...
Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

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.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
Schwarzschild Radius and Event Horizon01:21

Schwarzschild Radius and Event Horizon

No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape velocity with the...
Subatomic Particles03:37

Subatomic Particles

Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
Acceleration due to Gravity on Other Planets01:24

Acceleration due to Gravity on Other Planets

The gravitational acceleration of an object near the Earth's surface is called the acceleration due to gravity. It can be measured by conducting simple experiments on Earth. However, such an experiment is impossible to conduct on the surface of other planets.
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...

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関連する実験動画

Updated: May 14, 2026

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

サブ水銀サイズの系外惑星.

Thomas Barclay1, Jason F Rowe, Jack J Lissauer

  • 1NASA Ames Research Center, Moffett Field, California 94035, USA. thomas.barclay@nasa.gov

Nature
|February 22, 2013
PubMed
まとめ
この要約は機械生成です。

天文学者は,ケプラー-37bを発見し,水星よりもかなり小さい,これまでに発見された最も小さな系外惑星を発見しました. この小さな,おそらく岩石の世界は,太陽のような恒星の周りを回っており,惑星系の多様性に関する新しい洞察を提供します.

さらに関連する動画

Bringing the Visible Universe into Focus with Robo-AO
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Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Simulation of the Planetary Interior Differentiation Processes in the Laboratory
06:04

Simulation of the Planetary Interior Differentiation Processes in the Laboratory

Published on: November 15, 2013

関連する実験動画

Last Updated: May 14, 2026

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

Bringing the Visible Universe into Focus with Robo-AO
10:35

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Simulation of the Planetary Interior Differentiation Processes in the Laboratory
06:04

Simulation of the Planetary Interior Differentiation Processes in the Laboratory

Published on: November 15, 2013

科学分野:

  • 外惑星科学とは,外惑星科学のこと.
  • 比較惑星学 比較惑星学

背景:

  • 惑星系外惑星の発見は,地球とは異なる多様な惑星系を明らかにしています.
  • 最近の進歩により,地球サイズの系外惑星とより小さな系外惑星の検出が可能になりました.
  • これまでに,太陽系にあるより小さい系外惑星は発見されていなかった.

研究 の 目的:

  • 水星よりかなり小さい系外惑星の発見を報告する.
  • これまで発見された最小の系外惑星とその宿主星を特徴づける.

主な方法:

  • ケプラー宇宙望遠鏡のトランジットフォトメトリーデータを活用して.
  • 惑星の大きさと軌道パラメータを決定するために,光の曲線の変動を分析する.

主要な成果:

  • ケプラー-37bの発見は,水星よりも小さく,月の大きさと比較できる系外惑星です.
  • ケプラー-37bは,太陽のような星ケプラー-37を周回する3つの惑星の内側にある.
  • 惑星の小ささと恒星との距離は,大気や水のない岩石の組成を示唆している.

結論:

  • ケプラー-37bは,検出された系外惑星の大きさの新しい下限を表しています.
  • この発見は,他の恒星系における惑星体の膨大な多様性を強調している.
  • このような小さな系外惑星のさらなる研究は,惑星の形成と進化を理解するために不可欠です.