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#exomoon

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Mikko Tuomi

After 25 years of the prediction of the possibility of observations, and despite the many hundred of well studied transiting #exoplanet systems, we are still waiting for the announcement of the first confirmed #exomoon.

Thwre are three steps that can lead to the discovery.

The steps are the formation, the orbital dynamics and long-term stability, and the observability of a given exomoon in a given system.

#astronomy
astrobiology.com/2023/11/the-d

Astrobiology · The "Drake equation" Of Exomoons - A Cascade Of Formation, Stability And Detection - Astrobiologywe are still waiting for the announcement of the first confirmed exomoon.
Public
Angelo Vermeulen

Today our SEADS collective presents it's latest art project 'Exomoon', a theater piece developed in co-production with Theater Neumarkt in Zurich.

Audiences of all ages are invited to embark on a journey to explore a speculative future settlement on an exomoon orbiting a distant star.

What will humanity's future in space look like? What values, identity, and knowledge will we choose to send, and who should carry this legacy?

#exomoon#spacesettlement#spaceculture
Public
Winchell Chung ⚛🚀

If a moon escapes its primary by tidal ejection, there is a high probability it will eventually return to collide with its planet
arxiv.org/abs/2210.02603
#ExoMoon #ExoPlanet

arXiv.orgConsequences of dynamically unstable moons in extrasolar systemsMoons orbiting rocky exoplanets in compact orbits about other stars experience an accelerated tidal evolution, and can either merge with their parent planet or reach the limit of dynamical instability within a Hubble time. We review the parameter space over which moons become unbound, including the effects of atmospheric tides on the planetary spin. We find that such tides can change the final outcome from merger to escape, albeit over a limited parameter space. We also follow the further evolution of unbound moons, and demonstrate that the overwhelmingly most likely long-term outcome is that the unbound moon returns to collide with its original parent planet. The dust released by such a collision is estimated to reach optical depths approximately 0.001, exhibit characteristic temperatures of a few hundred degrees Kelvin, and last for a few thousand years. These properties make such events an attractive model for the emerging class of middle-aged main sequence stars that are observed to show transient clouds of warm dust. Furthermore, a late collision between a planet and a returning moon on a hyperbolic orbit may sterilise an otherwise habitable planet.
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