Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Detection of Black Holes01:10

Detection of Black Holes

2.4K
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
2.4K
Schwarzschild Radius and Event Horizon01:21

Schwarzschild Radius and Event Horizon

2.5K
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...
2.5K
Kepler's Third Law of Planetary Motion01:18

Kepler's Third Law of Planetary Motion

4.0K
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...
4.0K
Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

5.1K
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,...
5.1K
Kepler's Second Law of Planetary Motion01:29

Kepler's Second Law of Planetary Motion

4.9K
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...
4.9K
Conservation of Angular Momentum: Application01:18

Conservation of Angular Momentum: Application

11.9K
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Examples of such systems include a freely spinning bicycle tire that slows over time due to torque arising from friction, or the slowing of Earth's rotation over millions of years due to frictional forces exerted on tidal deformations. However in the absence of a net external torque, the angular momentum remains conserved. The conservation of angular momentum principle requires a...
11.9K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Aerosols and hydrocarbons in the atmosphere of a white dwarf planet.

Nature·2026
Same author

Uncovering the rapidly evolving orbits of the dynamic TOI-201 system.

Science advances·2026
Same author

Synthesis of Azatide Dipeptide Analogs and Their Stability and Reactivity in 98% <i>w</i>/<i>w</i> Sulfuric Acid.

Molecules (Basel, Switzerland)·2026
Same author

Stability and Reactivity of Alternative Nucleobases in Concentrated Sulfuric Acid.

Molecules (Basel, Switzerland)·2026
Same author

Discovery of the most compact 3+1-type quadruple star system TIC 120362137.

Nature communications·2026
Same author

Gas-depleted planet formation occurred in the four-planet system around the red dwarf LHS 1903.

Science (New York, N.Y.)·2026

関連する実験動画

Updated: Dec 8, 2025

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

3.8K

白い矮星を通過する巨大惑星候補

Andrew Vanderburg1,2, Saul A Rappaport3, Siyi Xu4

  • 1Department of Astronomy, University of Wisconsin-Madison, Madison, WI, USA. avanderburg@wisc.edu.

Nature
|September 17, 2020
PubMed
まとめ

天文学者は白矮星を周回する木星サイズの惑星を発見した. この発見により 巨大な惑星は 白い矮星を周回する近距離軌道で 生き延びることができると考えられ

さらに関連する動画

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

19.9K
Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

10.8K

関連する実験動画

Last Updated: Dec 8, 2025

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

3.8K
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

19.9K
Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

10.8K

科学分野:

  • 天文学と天体物理学
  • 外惑星科学
  • 星の進化について

背景:

  • 何千もの系外惑星が 発見され 赤い巨星と白い矮星が 形成されています
  • 恒星の近くを回っている惑星は 赤い巨人期に包まれます
  • 白い矮星の周りの岩石の残骸の証拠は 破壊された惑星を示唆しますが 完全な巨大な惑星は 近い軌道で検出されませんでした

研究 の 目的:

  • 白い矮星を周回する軌道で 生き残る巨大な惑星の可能性を 調べるためだ
  • 白い矮星WD 1856+534の 惑星候補の通過を分析する
  • 白い矮星を周回する惑星の 軌道動態と生存メカニズムを理解するために

主な方法:

  • 白い矮星WD 1856+534の周期的な暗くなった観測.
  • 惑星候補の星を通過する様子を モデル化しています
  • 木星に対する惑星候補の大きさと質量の分析.
  • 近い恒星/亜恒星の共同エンベロープ進化モデルとの比較

主要な成果:

  • 木星に匹敵する巨大惑星候補の検出 WD 1856+534を1.4日ごとに通過する.
  • 惑星候補の質量は 木星の14倍以上ではないと推定されています
  • 惑星候補の軌道周期と低質量により 共通の封筒の進化は 近い軌道への説明には不十分である.
  • この発見により 巨大惑星は 潮の干渉なしに 白い小惑星の周りの 狭い軌道に散らばる可能性があることが示されました

結論:

  • 巨大な惑星は 白い矮星を周回する近距離の軌道を 生き残ることができるのです
  • WD 1856+534系は,散乱メカニズムが,巨大な惑星を,混乱することなく,緊密な軌道に配置できることを証明しています.
  • この発見は 白い矮星の周りを 通過する小さな惑星のさらなる探求を促しました