Of the total radiation from the sun, only half a billionth reaches the earth.
How hot is the sun?
The temperature on the surface of the sun is a modest 5800 degrees, while the interior of the sun is 15 million degrees.
Water droplets and its splash
A water droplet usually makes a splash when it hits the ground and spreads upwards in smaller droplets, but when the pressure drops below 0.2 atm. it does not splash. Therefore, a water droplet does not splash on the Moon.
How many impact craters are there on the moon?
There are approximately 640,000 impact craters on the moon.
Convergent evolution of the car speed curve
If the curve for the development of cars’ top speed had converged with the curve for the number of calculations per second in a PC processor over the last 25 years, we would today have cars that could drive approximately 45,000,000,000,000 km/h. That’s the equivalent of driving a trip to the sun in about 15 minutes.
Footprints on the moon
The Apollo astronauts’ footprints on the Moon will not disappear for another 10 million years.
The Diamond Star
Astronomers have discovered a 10 billion trillion trillion trillion carat diamond star. The cosmic diamond is a piece of crystallized carbon that is 1500 km in diameter. It is located about 50 light years away in the constellation Centaurus.
How much does our solar system rotate?
Our solar system rotates once around the center of our galaxy every 300 million years.
Withheld knowledge about UFOs
48% of Americans believe that authorities are withholding knowledge about UFOs.
Americans who have been abducted by UFOs
According to UFO researchers, as many as 4.2 million Americans believe they have been abducted by UFOs. Assuming the same is true worldwide, more than 100 million people have taken a trip into space.