Scientists at the US space agency “NASA” said that they have discovered an area where planets are habitable, noting that they remain at an ideal temperature for a short period of time, but then they turn into places that are not suitable for life.
They explained that the planets are located inside and outside the habitable zone with time, according to the change in the star’s brightness and temperature.
Scientists believe that this means that the number of worlds that could contain alien life has been greatly exaggerated, as experts had assumed before this study that the temperature on the planets had remained relatively constant.
Although some planets are found in the “moderate zone” or what is also known as “habitable” at the present time, their previous history makes it impossible for the emergence of life on them, as experts at the center say that these planets were not in this region previously.
Experts at NASA believe that between 29 and 74 percent of planets in the current habitable zone have not been there before.
The Earth was formed about 4.5 billion years ago, yet life did not begin to develop until about 3.7 to 3.9 billion years ago.
Scientists believe that it took hundreds of millions of years of asteroids and meteorites hitting the Earth’s surface, bringing water and chemicals, before life could be launched on our planet.
Astronomers estimate that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of sun-like stars in the Milky Way alone.
NASA is scheduled to launch the Dragonfly mission in 2027, which is to send a drone-like vehicle designed for short trips to survey the hazy skies of Saturn’s massive, potentially life-hosting moon.
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An exciting discovery.. Did the components of life arrive on Earth from space?
The US Space Force’s budget includes $60 million for a “tactically responsive space.”
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