Astronomy Facts & Trivia - Page 2
The speed of light - 299 million meters a second - would still take about 26 billion years to reach one end of the visible universe to the other.
The sky is blue because when sunlight collides with our atmosphere, colours of the shortest wavelengths (violet and blue) are scattered - and our eyes are more sensitive to see blue. One of Jupiter's moons is believed to grow and shrink because of the water beneath its frozen surface. Sciensational.com
The number of neuron cells in our brain is more than the total number of stars in our galaxy. Sciensational.com The planet Venus has the longest day. The Earth is the densest planet in the solar system. Sciensational.com |
The moon orbits the Earth every 27.32 days Every second, the Sun pumps more than a million tons of material into the space through the solar wind (electrically charged particles.) Sciensational.com
The pressure at the centre of the Earth is 27,000 tons per square inch.
The smallest planet in our solar system is Pluto (now called 'dwarf planet' and not a true planet.)
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Voyager 1 spacecraft is the farthest human-made object in the universe. 
The planet Saturn has a density lower than water. So, if placed in water it would float. 
On Uranus, each pole gets around 42 years of continuous sunlight, followed by 42 years of darkness.
A dwarf star is so dense that it would take 8 men to lift a teaspoon full of its matter. 
The planet Venus does not tilt as it goes around the Sun, so consequently, it has no seasons. 
Since Neptune's discovery in 1846, it has made just about three-quarters of one revolution around the Sun. 
Uranus is tipped on its side so that one pole is pointed at the Sun, so its poles are warmer than its equator. 
A cosmic year is the amount of time it takes the Sun to revolve around the center of the Milky Way, about 225 million years. 
A day on the planet Mercury is twice as long as its year. Mercury rotates very slowly but revolves around the Sun in slightly less than 88 days. 
The star Alpha Herculis is so big that 25 of our entire solar system would have to be placed end to end to equal the star's diameter.