Astronomy! Meet The Giant Exoplanet As Light As Styrofoam — Larger Than Jupiter And About 320 Light-Years From Earth

Written by Fabio Lucas Carvalho

Published on 09/01/2025 at 17:43

Updated on 09/01/2025 at 17:44

Foto: Robinson/Universidade Lehigh

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Astronomy Scholars Discovered a Giant Exoplanet, Larger Than Jupiter, But Surprisingly Light, With Density Comparable to

Imagine a planet so light that its density is comparable to that of Styrofoam, so close to its star that its temperatures reach extreme levels and with an atmosphere full of exotic compounds that seem to defy the logic of astronomy.

This is the exoplanet KELT-11b, which was discovered in 2016 using the Kilodegree Extremely Little Telescope (KELT).

According to scholars in astronomy, the planet is classified as a highly inflated gas giant, belonging to the category of “Hot Jupiters“.

ARTICLE CONTINUES BELOW

Orbit and Atmospheric Conditions

The planet completes an orbit around its star in just 4.7 days, at an average distance of 0.06229 AU. This proximity results in high atmospheric temperatures, estimated at around 1,712 K (1,439 °C), which causes its atmosphere to expand remarkably.

Observations made in 2022 by the CHEOPS space telescope, from the European Space Agency (ESA), allowed for precise measurements of the planet’s radius, estimated at 181,600 km, with a margin of error under 4,300 km.

These measurements are five times more accurate than those previously made with ground-based instruments.

Atmospheric Composition

The atmosphere of KELT-11b has attracted significant attention from scientists due to its unique chemical composition and characteristics.

Spectroscopic studies conducted in 2023 identified the presence of water vapor in subsolar amounts, in addition to elements such as hydrogen cyanide (HCN) and titanium and aluminum oxides.

Furthermore, sodium was detected, reinforcing the chemical complexity of the atmosphere.

Analyses also indicate that the atmosphere of KELT-11b is predominantly cloud-free, allowing for efficient heat redistribution between the day side and the night side of the planet.

This is particularly interesting for studies of energy transfer in atmospheres of exoplanets close to their stars.

Misaligned Orbit and Spectroscopic Astronomy Studies

Another intriguing aspect is KELT-11b’s misaligned orbit relative to the equator of its star. Observations made in 2022 estimated a projection angle of -77.86 degrees, indicating that the planet has a significantly inclined trajectory.

This misalignment may offer clues about the gravitational dynamics of the planetary system and the processes involved in the formation and evolution of the planet.

Scientific Importance and Future Studies

KELT-11b is considered a natural laboratory for atmospheric characterization, especially due to its proximity to a bright star.

The planet’s low density facilitates spectroscopic analysis of its atmosphere, making it one of the best candidates for detailed studies with the next generation of space telescopes, such as the James Webb Space Telescope (JWST).

The combination of high temperature, exotic atmospheric composition, and misaligned orbit makes KELT-11b a valuable object for investigating the formation of gas giants and their interactions with their host stars.

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Astronomy! Meet The Giant Exoplanet As Light As Styrofoam — Larger Than Jupiter And About 320 Light-Years From Earth

Astronomy Scholars Discovered a Giant Exoplanet, Larger Than Jupiter, But Surprisingly Light, With Density Comparable to

Orbit and Atmospheric Conditions

Atmospheric Composition

Misaligned Orbit and Spectroscopic Astronomy Studies

Scientific Importance and Future Studies

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Astronomy! Meet The Giant Exoplanet As Light As Styrofoam — Larger Than Jupiter And About 320 Light-Years From Earth

Astronomy Scholars Discovered a Giant Exoplanet, Larger Than Jupiter, But Surprisingly Light, With Density Comparable to

Orbit and Atmospheric Conditions

Atmospheric Composition

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Scientific Importance and Future Studies

In the cold desert of Ladakh, where it hardly rains, engineer Sonam Wangchuk created the ice stupa, a tower that freezes winter water and stores it for irrigating crops in the spring, a simple engineering feat that mimics nature.

Libya built over 4,000 kilometers of underground pipelines to bring water from the Sahara to coastal cities in a project that the government itself called the Eighth Wonder of the World.

Chinese woman planted trees for decades while sand buried part of her house, received $5,000 from an American in 1999, and helped transform the desert into a forest of 8 million trees in China.

Almost 6,000 residents live concentrated along a single street nearly 9 km long in the interior of Poland. Houses form a continuous row, and behind them, narrow agricultural strips emerge, creating one of the most unusual rural patterns in Europe.

Desert sand, previously discarded for being too smooth for concrete, becomes an ecological brick in the United Arab Emirates, dispensing with Portland cement, curing at room temperature, and attempting to transform dunes useless for construction into raw material for a new arid engineering.

Described by astronauts as one of the most unlikely natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 square kilometers in the middle of the desert and transforms Botswana into a living labyrinth of channels, islands, and flooded areas.

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