The size of our earth
IS KOO BUT NEXT TIME SMILE FOR THE CAMARA CUZ UR ON AMERICAS FUNNIEST VIDEOS! LOL -
johnnny
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mabye mabye not, but it wouldnt generate the amount of heat anywhere close to our sun, i think a suns heat output is a function of its size which makes sense, but i garuntee you if jupiter was a small star, we wouldnt have only day, and not night, we would all be black or dark brownPELON wrote:IF IT WAS BIGGER THAN U WOULDNT KNOW ABOUT IT...U WOULD BE DEAD.....johnnny wrote:i read somewhere that if jupiter was just slightly more bigger it would give off heat like a sun
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Sentenza
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I doubt that we would live, cause its already enough when the distance to the sun changes the slightest bit. It turns earth either into an oven or ice age....johnnny wrote:mabye mabye not, but it wouldnt generate the amount of heat anywhere close to our sun, i think a suns heat output is a function of its size which makes sense, but i garuntee you if jupiter was a small star, we wouldnt have only day, and not night, we would all be black or dark brownPELON wrote:IF IT WAS BIGGER THAN U WOULDNT KNOW ABOUT IT...U WOULD BE DEAD.....johnnny wrote:i read somewhere that if jupiter was just slightly more bigger it would give off heat like a sun
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Sentenza
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More facts about the universe....this shit always trips me out...
The Universe
There are an estimated 50 billion galaxies in the universe.
As late as 1820, the universe was thought by European scientists to be 6,000 years old. It is now thought to be about 15 billion years old.
The Earth is rotating on its axis at a rate of 460 metres per second at the equator, and is orbiting the sun at a rate of about 30 kilometres per second. The sun is orbiting the centre of the Milky Way at a rate of about 220 kilometres per second. The Milky Way is moving at a speed of about 1000 kilometres per second towards a region of space 150 million light years away called the Great Attractor.
It is possible that many planets in the galaxy may not orbit around stars. Recent work by Kailash Sahu found six gravitational lenses in the star cluster M22 from objects smaller than brown dwarfs, the smallest type of star. Only one gravitational lensing event by a star was found in the same work.
A "light year" is a measure of distance, not time. It is the distance that light travels in a year and is equal to about 9.5 trillion kilometres, or about 6 trillion miles.
While astronomers used to believe that galaxies were distributed more or less evenly through space, they have now found regions where galaxies are rare or absent. The largest of these regions is located in the direction of the constellation Bootes, and measures more than 300 million light years across.
The matter in the universe is so thinly dispersed that the universe can be compared with a building twenty miles long, twenty miles wide, and twenty miles high, containing only a single grain of sand.
About 25% of the universe consists of "dark matter", and about 70% consists of "dark energy", leaving only about 5% of the universe visible to us.
The Universe
There are an estimated 50 billion galaxies in the universe.
As late as 1820, the universe was thought by European scientists to be 6,000 years old. It is now thought to be about 15 billion years old.
The Earth is rotating on its axis at a rate of 460 metres per second at the equator, and is orbiting the sun at a rate of about 30 kilometres per second. The sun is orbiting the centre of the Milky Way at a rate of about 220 kilometres per second. The Milky Way is moving at a speed of about 1000 kilometres per second towards a region of space 150 million light years away called the Great Attractor.
It is possible that many planets in the galaxy may not orbit around stars. Recent work by Kailash Sahu found six gravitational lenses in the star cluster M22 from objects smaller than brown dwarfs, the smallest type of star. Only one gravitational lensing event by a star was found in the same work.
A "light year" is a measure of distance, not time. It is the distance that light travels in a year and is equal to about 9.5 trillion kilometres, or about 6 trillion miles.
While astronomers used to believe that galaxies were distributed more or less evenly through space, they have now found regions where galaxies are rare or absent. The largest of these regions is located in the direction of the constellation Bootes, and measures more than 300 million light years across.
The matter in the universe is so thinly dispersed that the universe can be compared with a building twenty miles long, twenty miles wide, and twenty miles high, containing only a single grain of sand.
About 25% of the universe consists of "dark matter", and about 70% consists of "dark energy", leaving only about 5% of the universe visible to us.
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northsidehtown
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Mcminister
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luckyleaf3
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MiChuhSuh
The color of a star, as determined by the peak frequency of the visible light, depends on the temperature of the star’s outer layers, including its photosphere.[65] Besides visible light, stars also emit forms of electromagnetic radiation that are invisible to the human eye. In fact, stellar electromagnetic radiation spans the entire electromagnetic spectrum, from the longest wavelengths of radio waves and infrared to the shortest wavelengths of ultraviolet, X-rays, and gamma rays. All components of stellar electromagnetic radiation, both visible and invisible, are typically significant.BxxMILITIA wrote:i noticed "sirius" n "rigel" are white stars, why is that so???
Using the stellar spectrum, astronomers can also determine the surface temperature, surface gravity, metallicity and rotational velocity of a star. If the distance of the star is known, such as by measuring the parallax, then the luminosity of the star can be derived. The mass, radius, surface gravity, and rotation period can then be estimated based on stellar models. (Mass can be measured directly for stars in binary systems. The technique of gravitational microlensing will also yield the mass of a star.[66]) With these parameters, astronomers can also estimate the age of the star.[67]