Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

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,...
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...
Circular Orbits and Critical Velocity for Satellites01:16

Circular Orbits and Critical Velocity for Satellites

The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
The Seven Crystal Systems: Overview01:24

The Seven Crystal Systems: Overview

Crystals with various point group symmetries belong to different crystal classes, which are synonymous terms. Despite being in the same class, crystals may have distinct shapes, like cubes and octahedra. There are 32 three-dimensional point groups, all of which are systematically divided into seven crystal systems.The basic cubic crystal system, exemplified by NaCl, features orthogonal vectors (α = β = �� = 90°) of equal lengths (a = b = c). When specific requirements are not imposed on the...
Reduced Mass Coordinates: Isolated Two-body Problem01:12

Reduced Mass Coordinates: Isolated Two-body Problem

In classical mechanics, the two-body problem is one of the fundamental problems describing the motion of two interacting bodies under gravity or any other central force. When considering the motion of two bodies, one of the most important concepts is the reduced mass coordinates, a quantity that allows the two-body problem to be solved like a single-body problem. In these circumstances, it is assumed that a single body with reduced mass revolves around another body fixed in a position with an...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

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

Science advances·2026
Same author

Translating Music to Touch: Exploring Tactile Perception of Pitch, Roughness, and Pleasantness.

IEEE transactions on haptics·2026
Same author

Plasma exchange in acute liver failure.

Current opinion in gastroenterology·2026
Same author

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

Nature communications·2026
Same author

A universal brown dwarf desert formed between planets and stars.

Proceedings of the National Academy of Sciences of the United States of America·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
Same journal

A native sulfur deposit in Gale crater, Mars.

Science (New York, N.Y.)·2026
Same journal

Coordinated demise of harmful algal blooms.

Science (New York, N.Y.)·2026
Same journal

Genetic effects put into context.

Science (New York, N.Y.)·2026
Same journal

Bacteria share proteins to survive antibiotics.

Science (New York, N.Y.)·2026
Same journal

Impacts shaped Earth's first continents.

Science (New York, N.Y.)·2026
Same journal

Erratum for the Report "Covalently bonded single-molecule junctions with stable and reversible photoswitched conductivity" by C. Jia <i>et al</i>.

Science (New York, N.Y.)·2026
See all related articles

Related Experiment Video

Updated: May 19, 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

Kepler-47: a transiting circumbinary multiplanet system.

Jerome A Orosz1, William F Welsh, Joshua A Carter

  • 1Astronomy Department, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA. orosz@sciences.sdsu.edu

Science (New York, N.Y.)
|August 31, 2012
PubMed
Summary
This summary is machine-generated.

Astronomers discovered Kepler-47, a unique planetary system with two planets orbiting a binary star. This finding demonstrates that planets can form and exist in systems with eclipsing binary stars.

More Related Videos

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

Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Related Experiment Videos

Last Updated: May 19, 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

Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Area of Science:

  • Exoplanetary science
  • Astronomy
  • Astrophysics

Background:

  • Binary star systems are common in the galaxy.
  • The formation and stability of planetary systems around binary stars present unique challenges.
  • Previous detections of planets in binary systems have been limited.

Purpose of the Study:

  • To report the detection and characterization of a two-planet system, Kepler-47, orbiting an eclipsing binary star.
  • To investigate the potential for planetary formation and habitability in binary star environments.
  • To establish that close binary stars can host complete planetary systems.

Main Methods:

  • Transit photometry using the Kepler Space Telescope to detect planetary transits.
  • Analysis of light curves to determine orbital periods, radii, and stellar properties.
  • Radial velocity measurements (implied) for mass determination and orbit confirmation.

Main Results:

  • Detection of Kepler-47, a system with two planets (Kepler-47b and Kepler-47c) orbiting an eclipsing binary star.
  • Inner planet (Kepler-47b) has a radius 3.0 times Earth's and orbits every 49.5 days.
  • Outer planet (Kepler-47c) has a radius 4.6 times Earth's, orbits every 303.2 days, and resides in the habitable zone.

Conclusions:

  • Kepler-47 is the first validated system with multiple planets orbiting an eclipsing binary star.
  • The existence of Kepler-47 demonstrates that complete planetary systems can form around close binary stars.
  • The outer planet's position in the habitable zone raises questions about potential habitability in such systems.