A few hundred thousand billion free-floating, Earth-sized planets may exist in the space between stars in the Milky Way, argues an international team of scientists in Astrophysics and Space Science.
Because it's required for astronomy claims this decade, they make note that those planets could have alien life.
The scientists have proposed that these life-bearing planets originated in the early Universe within a few million years of the Big Bang, and that they make up most of the so-called 'missing mass' of galaxies. They calculate that such a planetary body would cross the inner solar system every 25 million years on the average and during each transit, zodiacal dust, including a component of the solar system’s living cells, becomes implanted at its surface. The free-floating planets would then have the added property of mixing the products of local biological evolution on a galaxy-wide scale.
Credit: Professor Chandra Wickramasinghe, Director of the Buckingham Centre for Astrobiology at the University of Buckingham
Since 1995, when the first extrasolar planet was reported, interest in searching for planets has reached a feverish pitch. The 750 or so detections of exoplanets are all of planets orbiting stars and there have been no realistic potential candidates for alien life. The possibility of a much larger number of planets was first suggested in earlier studies where the effects of gravitational lensing of distant quasars by intervening planet-sized bodies were measured.
Recently several groups of investigators have suggested that a few billion such objects could exist in the galaxy. The new research has increased this grand total of planets to a few hundred thousand billion (a few thousand for every Milky Way star) - each one harboring the legacy of ancient cosmic primordial life.
Citation: Wickramasinghe NC et al (2012), 'Life-bearing primordial planets in the solar vicinity', Astrophysics and Space Science, DOI 10.1007/s10509-012-1092-8
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- From The Great Wall To The Great Collider
- Early Human Ancestor Did Not Have The Jaws Of A Nutcracker
- How Gut Inflammation Sparks Colon Cancer
- Increase In Volcanic Eruptions At The End Of The Ice Age Caused By Melting Ice Caps And Erosion
- Would New Planet X Clear Its Orbit? - And Any Better Name Than "Planet Nine"?
- A Conservative Argument For Genetic Modification Of Embryos
- A Long, Hot View: Climate Change Likely To Extend Across Next 10,000 Years
- " Not to put words in the authors mouth I believe what he is referring to is the attribution of..."
- "This is all just fear-mongering, clap-trap! If things go according to these prediction, but no..."
- "like the sages of israel say g-d created the rules and he dont owe anyone anything weather this..."
- "This is not surprising. In fact in a cohort with autism in general who did not have this specific..."
- Here’s Why Surge in Hepatitis B Cases is No Surprise
- Whooping Cough Booster Declines Rapidly Over 4 Years
- Unapproved Stem Cell Therapies, a Public Health Menace
- Enjoying the Sun’s Vitamin D, While Blocking Skin Cancer
- Norovirus: From Satan’s Biohazard Lab To Your Duodenum
- Health Briefs: What You Missed Over the Weekend
- Stress could help activate brown fat
- Air pollution exposure during pregnancy linked with asthma risk
- Exposure to air pollution 30 years ago associated with increased risk of death
- Diabetes drug shown to help body rebuild after heart attack
- New evidence gives women informed choice in the prolapse surgery debate