Why planetary and exoplanetary protection differ: The case of long duration genesis missions to habitable but sterile M-dwarf oxygen planets

  title={Why planetary and exoplanetary protection differ: The case of long duration genesis missions to habitable but sterile M-dwarf oxygen planets},
  author={Claudius Gros},
  journal={Acta Astronautica},
  • C. Gros
  • Published 8 January 2019
  • Physics, Geology
  • Acta Astronautica

The First Interstellar Astronauts Will Not Be Human

The Cosmic Significance of Directed Panspermia: Should Humanity Spread Life to Other Solar Systems?

Abstract The possibility of seeding other planets with life poses a tricky dilemma. On the one hand, directed panspermia might be extremely good, while, on the other, it might be extremely bad

Salt deliquescence can support extraterrestrial life

In the event of accidental transmission of microbes to other planets, we must consider whether the local conditions would allow their proliferation. Whereas temperatures on Mars are usually hostile



Water loss from terrestrial planets orbiting ultracool dwarfs: implications for the planets of TRAPPIST-1

Ultracool dwarfs (UCD) encompass the population of extremely low mass stars (later than M6-type) and brown dwarfs. Because UCDs cool monotonically, their habitable zone (HZ) sweeps inward in time.

Searching for Life on Mars Before It Is Too Late

This study argues that delaying any efforts for the biological reconnaissance of Mars during the next two or three decades and directly sending human missions to the planet demand reconsideration because once an astronaut sets foot on Mars, Planetary Protection policies as the authors conceive them today will no longer be valid.

Deceleration of High-velocity Interstellar Photon Sails into Bound Orbits at α Centauri

At a distance of about 4.22 ly, it would take about 100,000 years for humans to visit our closest stellar neighbor Proxima Centauri using modern chemical thrusters. New technologies are now being

Project Icarus: Optimisation of nuclear fusion propulsion for interstellar missions

Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1

The observations reveal that at least seven planets with sizes and masses similar to those of Earth revolve around TRAPPIST-1, and the six inner planets form a near-resonant chain, such that their orbital periods are near-ratios of small integers.

Searching for Life on Mars Before It Is Too Late.

Abstract Decades of robotic exploration have confirmed that in the distant past, Mars was warmer and wetter and its surface was habitable. However, none of the spacecraft missions to Mars have

Habitability in Brown Dwarf Systems

The very recent discovery of planets orbiting very low mass stars sheds light on these exotic objects. Planetary systems around low-mass stars and brown dwarfs are very different from our solar

The Interaction of Relativistic Spacecrafts with the Interstellar Medium

The Breakthrough Starshot initiative aims to launch a gram-scale spacecraft to a speed of v ∼ 0.2c, capable of reaching the nearest star system, α Centauri, in about 20 years. However, a critical

Revised planetary protection policy for solar system exploration.

  • D. DevincenziP. Stabekis
  • Physics, Geology
    Advances in space research : the official journal of the Committee on Space Research
  • 1984

Developing ecospheres on transiently habitable planets: the genesis project

It is argued here, that this is indeed possible when seeding the candidate planet with the microbial lifeforms, bacteria and unicellular eukaryotes alike, characterizing earth before the cambrian explosion, and that an interstellar mission of this kind, denoted the ‘Genesis project’, could be carried out by a relatively low-cost robotic microcraft equipped with a on-board gene laboratory for the in situ synthesis of the microbes.