India Environment Portal Knowledge for change

Astrobiology

• Nonphotosynthetic pigments as potential biosignatures

  <p>Previous work on possible surface reflectance biosignatures for Earth-like planets has typically focused on analogues to spectral features produced by photosynthetic organisms on Earth, such as the

  • 18/05/2015

  • Astrobiology
  • • Planets
    • Physical Science
    • Astronomy

• Extreme water loss and abiotic O2 buildup on planets throughout the habitable zones of M dwarfs

  <p>We show that terrestrial planets in the habitable zones of M dwarfs older than *1 Gyr could have been in runaway greenhouses for several hundred million years following their formation due to the star&rsquo;s

  • 15/01/2015

  • Astrobiology
  • • Planets
    • Physical Science
    • Green House Gases