free-floating planet Archives - Page 2 of 2 - Astrobiology

The color shows the product of the radiation flux at a wavelength of 3 µm and the square of the distance for the case of a prograde fall of the planet onto the disk. Model parameters: q = 5 AU, ω = 90◦ , i = 10◦ . The time moment t = 200 years from the beginning of the calculations is shown on the left, t = 290 years is shown in the center, and t = 500 years is shown on the right. The upper graphs correspond to the direction of the line of sight against the z axis, and the lower ones along the y axis. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Press Release, Stellar Cartography

Simulation of Images of Protoplanetary Disks After Collision with Free-floating Planets

by Keith CowingJuly 5, 2025July 5, 2025

Observational manifestations of disturbances in a protoplanetary disk caused by a collision with a massive planet are studied.

The magnification excess maps for planet-satellite configurations with log q = −1.5 and | log s| = 0.3. The color coding indicates fractional magnification differences between the 2L1S and 1L1S models. The maps with wide-separation (log s = 0.3) and close-separation (log s = −0.3) cases are displayed in the upper and lower panels, respectively. The left and right panels correspond to Earthmass and Neptune-class planets. The x-y coordinates denote the source positions in units of θE, with the positive x-axis aligned in the direction pointing from the planet (gold star) to the satellite (cyan star). Magenta circles indicate the source stars’ sizes (ρ = 0.33 for Earth-mass lenses and ρ = 0.08 for Neptune-class). Caustics are depicted in red, with the central caustic located near the planet and the satellite caustics positioned farther away. Each panel includes a lower-right inset offering a zoom-in view of the central caustics. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Detecting Exomoons In Free-Floating-Planet Events From Space-based Microlensing Surveys

by Keith CowingMay 30, 2025May 26, 2025

When a planet is ejected from its star-planet system due to dynamical interactions, its satellite may remain gravitationally bound to the planet.

Spatial distribution of our candidates (red circles) and of known members from Esplin & Luhman (2019) and Galli et al. (2019) (red crosses). The Euclid VIS image field-of-view is represented as a white rectangle. Photograph credit: Chris Fellows.

Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Interstellar, Status Report

Free-floating Planetary Mass Objects In LDN 1495 From Euclid Early Release Observations

by Keith CowingMarch 9, 2025March 9, 2025

Context. Substellar objects, including brown dwarfs and free-floating planetary-mass objects, are a significant product of star formation. Their sensitivity to initial conditions and early dynamical evolution makes them especially valuable […]

This artist’s concept shows what the isolated planetary-mass object SIMP 0136 could look like based on recent observations from NASA’s James Webb Space Telescope and previous observations from Hubble, Spitzer, and numerous ground-based telescopes. Researchers used Webb’s NIRSpec (Near-Infrared Spectrograph) and MIRI (Mid-Infrared Instrument) to measure subtle changes in the brightness of infrared light as the object completed two 2.4-hour rotations. -- NASA, ESA, CSA, and Joseph Olmsted (STScI)

Astronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Icy Worlds, Imaging & Spectroscopy, Press Release

Webb Exposes Complex Atmosphere of Free-Floating Super-Jupiter SIMP 0136

by Keith CowingMarch 4, 2025March 4, 2025

An international team of researchers has discovered that previously observed variations in brightness of a free-floating planetary-mass object known as SIMP 0136 must be the result of a complex combination […]

A Free Floating Planet -- Grok via Astrobiology.com

Astronomy & Telescopes, Exoplanets, -moons, -comets, Interstellar, Status Report

Properties of Free Floating Planets Ejected through Planet-Planet Scattering

by Keith CowingJanuary 24, 2025January 24, 2025

Multiple studies have shown that planet-planet scattering plays an important role in the dynamical evolution of planetary systems. For instance, it has been shown that planet-planet scattering can reproduce the […]

The Chinese Space Station Telescope (CSST) - CNSA/Xinhua

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Chinese Space Station Telescope: Detecting Exomoons in Free-Floating-Planet Events from Space-based Microlensing Surveys

by Keith CowingJanuary 9, 2025January 9, 2025

When a planet is ejected from its star-planet system due to dynamical interactions, its satellite may remain gravitationally bound to the planet.

Building a Dyson Spehere -- Grok via Astrobiology.com

Astronomy & Telescopes, Citizen Science / Open Science, Habitable Zones, Status Report, Terraforming & Geoengineering

Making Habitable Worlds: Planets Versus Megastructures

by Keith CowingOctober 16, 2024October 16, 2024

In 2016, a star KIC 8462852 caught the world’s attention due to a paper by citizen scientists who noticed its seemingly unexplainable brightness variations. The forward theory was offered – […]