What Is Goldilocks Zone
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There is only one planet we know of so far that is teeming with life––Earth. And on our planet, water is a critical ingredient for life as we know it. While astronomers still don't know whether there's life on other planets, they narrow the search for potentially habitable worlds using a handful of criteria. Because our blueprint for life is Earth, astronomers look for planets with Earth-like characteristics, like liquid water. But a celestial object can only orbit so close (like Mercury) or so far (like Pluto) from its star before water on its surface boils away or freezes. The 'Goldilocks Zone,' or habitable zone, is the range of distance with the right temperatures for water to remain liquid. Discoveries in the Goldilocks Zone, like Earth-size planet Kepler-186f, are what scientists hope will lead us to water and one day life.
Liquid water is essential for life as we know it. Where we find liquid water on Earth we also find life.
"The only life we know about is our carbon-based life, and water plays a crucial part in our own existence, and so it's only natural that we direct our attention to planets in locations capable of having liquid water," Professor John Webb of the University of New South Wales said.
The Goldilocks Zone refers to the habitable zone around a star where the temperature is just right - not too hot and not too cold - for liquid water to exist on an planet. ... Looking for planets in the Goldilocks Zone is a way that allows scientists to hone in their search for Earth-like planets that could contain life.
The entire orbits of the Moon, Mars, and numerous asteroids also lie within various estimates of the habitable zone. Only at Mars' lowest elevations (less than 30% of the planet's surface) is atmospheric pressure and temperature sufficient for water to, if present, exist in liquid form for short periods.
The new definition isn't radically different from the old one. For example, in our own solar system, the boundaries of the habitable zone have shifted from between 0.95 astronomical units (AU, or the distance between Earth and the sun) and 1.67 AU, to the new range of 0.99 AU to 1.7 AU.
The Goldilocks Rule states that humans experience peak motivation when working on tasks that are right on the edge of their current abilities.
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