Dwarf Planet Eris

Dwarf Planet Eris

Eris Dwarf Planet: Size, Diameter, Mass, Location, Facts, Distance, Temperature, Color, Orbit

Eris, a distant and captivating inhabitant of the Kuiper Belt, invites us to explore the outer realms of our solar system. As we delve into the intriguing characteristics of this dwarf planet, we uncover a tale of cosmic discovery that challenges our understanding of celestial dynamics and offers insights into the vastness of space.

Eris Dwarf Planet Size Compared to Earth

Eris, a dwarf planet, is notably smaller than Earth. The diameter of Eris is approximately 1,445 miles (2,326 kilometers), which is significantly smaller compared to Earth's diameter of about 7,917 miles (12,742 kilometers). This size difference highlights the diverse range of celestial bodies within our solar system.

What is The Diameter of Eris Dwarf Planet

The diameter of Eris is approximately 1,445 miles (2,326 kilometers). This measurement places Eris in the category of small celestial bodies, particularly when compared to larger planets like Earth.

What is Eris Dwarf Planet Mass

Eris has a smaller mass compared to Earth, consistent with its dwarf planet status. While Earth has a mass of approximately 5.97 x 10^24 kilograms, Eris's mass is estimated to be around 1.66 x 10^22 kilograms. This makes Eris significantly less massive compared to Earth.

Where is Eris Dwarf Planet Located

Eris is situated in the scattered disc, a distant region of our solar system that extends beyond the Kuiper Belt. Eris is located in the scattered disc, a region that stretches far beyond the Kuiper Belt, making it one of the more distant known objects in our solar system. Its position in this distant region contributes to the unique characteristics of Eris.

10 Interesting Fun Facts About Eris Dwarf Planet

  1. Eris was discovered in 2005 by astronomer Mike Brown and his team.
  2. It is named after the Greek goddess of strife and discord.
  3. Eris is one of the largest known dwarf planets in our solar system.
  4. The dwarf planet has one known moon, named Dysnomia, after Eris's daughter, the demon goddess of lawlessness.
  5. Eris has a highly eccentric orbit, meaning its distance from the Sun varies significantly over its orbital path.
  6. The surface of Eris is likely composed of a mixture of nitrogen, methane, and other ices.
  7. Its discovery played a role in the reclassification of Pluto from a planet to a dwarf planet.
  8. Eris is part of the scattered disc, a population of icy bodies with eccentric orbits.
  9. The dwarf planet is so distant that it takes sunlight over 8 hours to reach Eris.
  10. Eris's discovery prompted a reevaluation of the definition of what constitutes a planet.

Eris Dwarf Planet Distance from Earth / Sun

The average distance from Eris to the Sun is approximately 9 billion miles (14.5 billion kilometers). This vast distance places Eris in the outer reaches of our solar system, where sunlight is much less intense compared to inner planets.

Eris Dwarf Planet Average Temperature

Given its significant distance from the Sun, Eris experiences extremely cold temperatures. The average temperature on Eris is estimated to be around -391 degrees Fahrenheit (-235 degrees Celsius). This extreme cold is a consequence of its location in the outer regions of the solar system.

Eris Dwarf Planet True Color

Eris's true color is a subject of scientific investigation. While detailed observations are challenging due to its distance, Eris is believed to have a reddish color, possibly due to the presence of complex organic compounds on its surface. Further studies, including those from space missions, are essential to refine our understanding of Eris's true color.

Eris Dwarf Planet Orbital Period

Eris's orbital period, or the time it takes to complete one orbit around the Sun, is approximately 557 Earth years. This extended orbital period is characteristic of objects in the scattered disc, reflecting the slow and measured pace at which they travel around the Sun.

Beyond Neptune: Eris's Remote Realm

Nestled within the Kuiper Belt, Eris resides in the frigid and distant expanse beyond Neptune. Its location places it among a cluster of icy bodies that share a common history and potential for revealing the secrets of our early solar system. Eris's status as the farthest known dwarf planet emphasizes its unique position as a cosmic observer of the outer reaches.

Eris Dwarf Planet Specification Table

Here's a detailed specification table for the dwarf planet Eris:

Characteristic Value
Discovery Year 2005
Distance from Sun ~68.01 AU (10.17 billion km)
Diameter ~2,326 km
Mass ~1.66 Ă— 10^22 kg
Orbital Period ~557 years
Rotation Period ~25.9 hours
Surface Composition Nitrogen, methane, and water ice
Albedo ~0.96 (high reflectivity)
Temperature ~-238°C (-396°F)
Moons One moon: Dysnomia
Exploration Missions None
Notable Features Remote location, high albedo, icy composition
Kuiper Belt Residency A member of the Kuiper Belt, a region beyond Neptune
Scientific Significance Influenced reclassification of celestial objects, offers insights into Kuiper Belt dynamics


Eris Dwarf Planet


The most captivating aspect of Eris lies in its role as a cosmic catalyst that reshaped our understanding of our solar system. Its discovery and subsequent reclassification prompted a reevaluation of planetary definitions, leading to a profound shift in how we categorize celestial objects. Eris embodies the ever-evolving nature of scientific knowledge, reminding us that even in the distant reaches of the Kuiper Belt, there are stories that challenge our perceptions and inspire us to explore the depths of space and the complexities of our cosmic heritage.

A Stellar Name: Mythological Significance

Eris draws its name from Greek mythology, where it symbolizes discord and rivalry. This choice of name reflects its role in sparking a reevaluation of celestial classification. The debate surrounding its classification—whether it qualifies as a planet or a dwarf planet—underscored the evolving nature of scientific understanding and the dynamic interplay of definitions in the cosmos.

Discovery and Identity: A Cosmic Controversy

Eris's discovery in 2005 triggered a wave of excitement and controversy. Initially hailed as the tenth planet, its status was subsequently reevaluated, leading to the creation of the "dwarf planet" category. This pivotal moment in astronomical history ignited discussions about what defines a planet and prompted a deeper exploration of the diverse inhabitants of the Kuiper Belt.

The Icy Enigma: Eris's Composition

Eris's icy surface and remote location contribute to its enigmatic nature. The presence of nitrogen ice and possible traces of methane reveal insights into its composition and the processes that shaped its frozen exterior. These icy features connect Eris to other Kuiper Belt objects and hint at the primordial conditions of the early solar system.

Through the Telescope: Observing Eris

While direct observation of Eris remains a challenge due to its distance, telescopic studies have provided valuable insights. Its relatively large size and high albedo contribute to its brightness, allowing astronomers to glean information about its surface properties and reflectivity. These observations contribute to our evolving understanding of this distant world.

Eris's Moons: A Satellite System

Eris's moon, Dysnomia, adds another layer to its intriguing narrative. Dysnomia's presence raises questions about Eris's history and the mechanisms that led to the formation of this moon. The interaction between Eris and Dysnomia provides a dynamic perspective on the evolution of satellite systems in the distant reaches of our solar system.

The Kuiper Belt Connection

Eris's presence within the Kuiper Belt tells a larger story about the dynamic environment that exists beyond the gas giants of our solar system. This region, rich in icy bodies, provides a snapshot of the conditions that prevailed during the solar system's early days. Eris's journey through the Kuiper Belt serves as a testament to the intricate interplay of celestial forces that have shaped its trajectory and its icy companions.

Championing Pluto's Neighbors

Eris's discovery and subsequent reclassification ignited discussions about the nature of Pluto and its fellow Kuiper Belt residents. As we study Eris and similar objects, we gain insights into the diversity of icy bodies that populate this distant realm. Eris's story invites us to reexamine our perceptions of planetary definitions and to celebrate the cosmic richness of the Kuiper Belt.

Frozen Echoes of the Past

Eris's icy surface and remote location offer us a glimpse into the past—a frozen echo of the early solar system's volatile and dynamic environment. The traces of nitrogen and methane ice serve as time capsules, preserving the conditions that prevailed billions of years ago. By studying these frozen compositions, scientists piece together a narrative of the solar system's infancy.

Pioneering Space Exploration

While Eris remains beyond the reach of current space missions, its significance continues to inspire the planning of future expeditions. The evolving landscape of space exploration technology holds promise for missions that could provide us with closer insights into Eris's surface, composition, and moon system. These endeavors will contribute to a deeper understanding of the Kuiper Belt's role in shaping our cosmic heritage.

Final Thoughts: Eris's Call to Explore

In conclusion, Eris beckons us to venture beyond the boundaries of familiar planets and explore the icy fringes of our solar system. Its distant orbit, icy surface, and role in the reclassification of celestial bodies stand as a testament to the dynamic nature of scientific discovery. As we continue to unravel the mysteries of Eris and its counterparts within the Kuiper Belt, we are reminded that the universe is a vast tapestry of stories, waiting to be unveiled, and that every distant world holds the potential to reshape our understanding of the cosmos.

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