K2 72 e Planet

K2 72 e Planet: Size, Mass, Gravity, Surface Temperature, Oxygen, Habitable, Atmosphere, Distance, Facts

K2 72 e Planet

Exploring K2-72e: A Super Earth in the Habitable Zone


Discover the intriguing exoplanet K2-72e, a super Earth located within the habitable zone of the red dwarf star K2-72. Unveiled in 2016 by NASA's Kepler spacecraft, K2-72e has captured the attention of astronomers and space enthusiasts alike.

Characteristics of K2-72e

Unraveling the mysteries of K2-72e involves understanding its mass, radius, and temperature. As an Earth-sized exoplanet, it boasts a mass of 2.21 Earths, a radius of 1.29 R🜨, and an equilibrium temperature of 261 K (−12 °C; 10 °F). Dive into the details of its composition and learn why it is considered likely rocky.

K2-72 e Size Compared to Earth in Percentage

K2-72 e's radius, measuring at 1.29 times that of Earth, implies that it is approximately 29% larger in size than our home planet. This relatively modest increase in size could influence various planetary characteristics.

K2-72 e Mass Compared to Earth in Percentage

With a mass of 2.21 Earths, K2-72 e is substantially more massive, approximately 221% the mass of Earth. The increased mass can affect the planet's gravity and geophysical processes.

K2 72 e planet compared to earth

K2-72e Surface Gravity Compared to Earth

Although the exact surface gravity of K2-72 e is not provided, its mass being 2.21 times that of Earth suggests that it likely has stronger surface gravity. This increased gravity could impact the planet's atmospheric conditions and landscape.

Surface Temperature of K2-72 e

The equilibrium temperature of K2-72 e is 261 K (−12 °C; 10 °F). This temperature indicates the average thermal conditions the planet experiences and is crucial for understanding its potential habitability.

Does K2-72e Have Oxygen

The available information does not specify whether K2-72 e has oxygen. Determining the composition of an exoplanet's atmosphere, including the presence of oxygen, usually requires direct observational data, which might be obtained through advanced telescopes.

Is K2-72 e Habitable

K2-72 e orbits within the habitable zone of its host star, K2-72, where conditions might allow for the existence of liquid water. However, being tidally locked and receiving 11% more insolation than Earth, challenges arise, such as potential ocean boiling. The habitability of such planets depends on a complex interplay of various factors.

K2-72e Atmosphere Composition

Details about the specific composition of K2-72 e's atmosphere are not provided. Analyzing an exoplanet's atmosphere usually requires advanced telescopes capable of studying the light passing through it to identify chemical signatures.

K2-72 e Distance from Earth in Light Years

K2-72 e is situated at a considerable distance of approximately 217.1 light-years from Earth in the constellation of Aquarius. This distance highlights the challenges of detailed observations and direct exploration.

K2 72 e planet

10 Interesting Fun Facts About K2-72 e

  1. Confirmation and Naming: K2-72 e was confirmed as part of the new results from NASA's Kepler spacecraft's "Second Light" mission in July 2016, marking its inclusion as the outermost of four planets in the K2-72 system.
  2. Size and Mass: Classified as an Earth-sized exoplanet, K2-72 e stands out with a radius 29% larger and a mass 221% that of Earth.
  3. Host Star Characteristics: Orbiting the red dwarf star K2-72, this star has only about 27% of the mass of the Sun and a radius of 33% of the Sun's. Its dimness requires observation through telescopes.
  4. Orbital Properties: Completing an orbit around its host star in approximately 24 days at a distance of about 0.106 AU (10% of Earth-Sun distance), K2-72 e follows a relatively tight orbital path.
  5. Habitability Considerations: While residing in the habitable zone, K2-72 e faces challenges due to likely tidal locking and receiving 11% more insolation than Earth. These factors impact potential habitability.
  6. Tidally Locked Rotation: The planet's rotation is likely tidally locked, resulting in one hemisphere facing the star continually, while the other remains in perpetual darkness.
  7. Insolation Levels: K2-72 e receives 11% more insolation than Earth, influencing its climate and environmental conditions.
  8. Longevity of Red Dwarf Stars: K2-72's status as a red dwarf indicates its potential to exist for an extended period, up to 1–2 trillion years, significantly longer than our Sun.
  9. Discovery Method: The transit method was employed to discover K2-72 e, measuring the dimming effect as the planet passed in front of its host star.
  10. Distance from Earth: Positioned approximately 217.1 light-years away in the constellation of Aquarius, K2-72 e provides a glimpse into exoplanetary systems beyond our solar system, emphasizing the vast cosmic distances involved in such discoveries.

Host Star - K2-72

Delve into the heart of the K2-72 system as we explore its (M-type) red dwarf star, K2-72. Hosting a total of four planets, K2-72e stands out with the longest orbital period. Learn about the star's characteristics, including its mass, radius, temperature, and why it remains hidden from the naked eye, shining with an apparent magnitude of 15.309.

Orbiting Dynamics

Discover the mesmerizing orbit of K2-72e around its host star. With a 24-day orbital period and an orbital radius 0.1 times that of Earth's, this super Earth offers a unique perspective on planetary dynamics. Compare its orbit to that of Mercury and gain insights into its position within the cosmic dance.

K2 72 e planet atmosphere

The Quest for Habitability

Explore the potential habitability of K2-72e, positioned within the habitable zone of its parent star. Uncover the conditions required for liquid water to exist on its surface and understand the implications of its likely rocky composition. Delve into the enigma of its tidal locking, presenting one side to eternal daylight and the other to perpetual darkness.

Vulnerabilities and Challenges

Contemplate the challenges that K2-72e faces in terms of habitability. With 11% more insolation than Earth, the risk of oceans boiling away raises questions about the sustainability of life. Examine the delicate balance necessary for habitability and the factors that could impact the potential for life on this distant exoplanet.

Discovery Journey

Embark on the journey of discovery that led to the revelation of K2-72e and its planetary companions. Unearth the details of the Kepler Space Observatory's involvement, the detection method employed (Transit), and the specifics of its orbital characteristics, including semi-major axis, eccentricity, and orbital period.


As we conclude our exploration of K2-72e, marvel at the wonders of this super Earth in the distant constellation of Aquarius. Its existence expands our understanding of exoplanets and fuels the ongoing quest for habitable worlds beyond our solar system.

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