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Examples
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The team analysed data from the European Southern Observatory about a star known as GJ 667C, which is known as an M-class dwarf star and puts out much less heat than our Sun.
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Circling just such an M-class dwarf star, the planet was announced as orbiting in a potentially habitable zone.
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The sun has just burped out a medium-sized M-class solar flare, not quite as huge as the Jupiter-sized X-class eruption earlier this week but still a clear sign that the star is ramping up its explosive 11-year cycle.
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In 2009 the sales of SUV's GL and M-class were recorded as 140 units, whereas July 2010 alone recorded sales at 60 units.
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The Burnhams live in the suburbs; mom sells real estate, chants motivational mantras and drives an M-class Mercedes; Dad barely holds down a dead-end job, and dreams about a high school cheerleader.
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Only two missions out of three of them: Euclid, PLATO and Solar Orbiter, can be selected for the M-class launch slots.
ESA's Tough Choice: Dark Matter, Sun Close Flyby, Exoplanets (Pick Two) | Universe Today 2010
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While Ingraham B was an M-class planet, it was not a terribly hospitable or pleasant world.
Star Trek: TNG: Losing the Peace William Leisner 2009
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While Ingraham B was an M-class planet, it was not a terribly hospitable or pleasant world.
Star Trek: TNG: Losing the Peace William Leisner 2009
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Most stars are smaller, M-class dwarfs. and many stars have larger Jovian planets brown dwarf companions up to 50 times the mass of Jupiter.
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A planet in the habitable zone of an M-class start might bear life if the planet is similar to Earth with a large moon.
Astronomers Find Super-Earth With An Atmosphere | Universe Today 2009
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