Californian Finds New Earth Planet
September 30, 2010
Steven Vogt, of the University of California at Santa Cruz, led the team of astrophysicists and astronomers that has discovered the most Earth-like planet ever found outside of our solar system.
The new planet has been named Gliese 581g.
Dr. Vogt's California team, with assistance from Paul Butler of the Carnegie Institute, announced their discovery after painstaking research that developed over 11 years --- or one complete solar cycle.
The California team collected 120 measurements using the Keck Observatory in Hawaii which is partnered with the University of California system.
"We've found this so soon, it suggests that we will find more," Vogt said of the planet and the red dwarf star it orbits, which is 20 light years away from Earth.
Previously, two other planets were located in the solar system --- 581c and 581d --- on the edges of the habitable zone. One planet was too cold and the other too hot, while 581g fell right in the middle, in the 'Goldilocks Zone' which can sustain life.
Requirements for a planet to sustain life are liquid water and a suitable atmosphere. Gliese 581g is at the right distance from its star and has the optimal range of temperatures to allow for liquid water, according to scientists.
The HIRES spectrometer used to record measurements of the star's radial velocity --- its motion along the line of sight from Earth --- was designed by Professor Vogt. The California professor's results will be published in the Astrophysical Journal.
Brad Hansen, an astronomer at the University of California at Los Angeles, commented on the discovery.
"We will learn more as we find more of these systems with planets with conditions that can sustain life. When we can compare planets in systems with all different sizes of stars we will start to understand better what makes a planet habitable," said Hansen.
The new Earth-like planet is much closer to its star than Earth is. Its orbit takes only 37 days to complete.
According to Professor Vogt, Gliese 581g is nearly four times the mass of Earth, indicating the surface is rocky with adequate gravity for maintaining a stable atmosphere.
Temperatures on the new planet reach highs of 160 degrees and lows of minus 25 degrees, with the area along the line between dark and light having the most temperate climate.
"This planet doesn't have days or nights. The most comfortable place is the terminator line between light and dark, where you'd see either constant sunrise or sunset," stated Professor Vogt of Gliese 581g.
Dr. Steven S. Vogt has been an astronomy and astrophysics professor with the University of California at Santa Cruz and the University of California Observatories research unit for 32 years.
It makes perfect sense that it would be a California scientist from an outstanding California university who would discover a new Earth.
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The new planet has been named Gliese 581g.
Dr. Vogt's California team, with assistance from Paul Butler of the Carnegie Institute, announced their discovery after painstaking research that developed over 11 years --- or one complete solar cycle.
The California team collected 120 measurements using the Keck Observatory in Hawaii which is partnered with the University of California system.
"We've found this so soon, it suggests that we will find more," Vogt said of the planet and the red dwarf star it orbits, which is 20 light years away from Earth.
Previously, two other planets were located in the solar system --- 581c and 581d --- on the edges of the habitable zone. One planet was too cold and the other too hot, while 581g fell right in the middle, in the 'Goldilocks Zone' which can sustain life.
Requirements for a planet to sustain life are liquid water and a suitable atmosphere. Gliese 581g is at the right distance from its star and has the optimal range of temperatures to allow for liquid water, according to scientists.
The HIRES spectrometer used to record measurements of the star's radial velocity --- its motion along the line of sight from Earth --- was designed by Professor Vogt. The California professor's results will be published in the Astrophysical Journal.
Brad Hansen, an astronomer at the University of California at Los Angeles, commented on the discovery.
"We will learn more as we find more of these systems with planets with conditions that can sustain life. When we can compare planets in systems with all different sizes of stars we will start to understand better what makes a planet habitable," said Hansen.
The new Earth-like planet is much closer to its star than Earth is. Its orbit takes only 37 days to complete.
According to Professor Vogt, Gliese 581g is nearly four times the mass of Earth, indicating the surface is rocky with adequate gravity for maintaining a stable atmosphere.
Temperatures on the new planet reach highs of 160 degrees and lows of minus 25 degrees, with the area along the line between dark and light having the most temperate climate.
"This planet doesn't have days or nights. The most comfortable place is the terminator line between light and dark, where you'd see either constant sunrise or sunset," stated Professor Vogt of Gliese 581g.
Dr. Steven S. Vogt has been an astronomy and astrophysics professor with the University of California at Santa Cruz and the University of California Observatories research unit for 32 years.
It makes perfect sense that it would be a California scientist from an outstanding California university who would discover a new Earth.











































