When you think of the size of the universe, there must be life elsewhere. There are 100 – 400 billion stars just in our galaxy, and just as many galaxies in the universe. If we estimate that 5% of all stars are sun-like, which is on the low side. There should be 500 quintillion sun-like […]Read more "The Great Filter"
The earliest working telescopes was made around 1608 with many who claimed its discovery. The design was simple; a convex objective lens and a concave eyepiece allowed the user to see further. In 1655, astronomers had build more powerful telescopes using a design by Kepler. This design used a convex objective lens and a convex […]Read more "The Early Telescopes"
Nicholas Copernicus was born February 19, 1473 and died May 24, 1543. Galileo Galilei was born February 15, 1566 and died January 8, 1642. Johannes Kepler was born December 27, 1571 and died November 15, 1630. Isaac Newton was born December 25, 1642 and died March 20, 1726. Tycho Brahe was born December 14, 1546 […]Read more "Historical Astronomers in Context"