Students Preparing a Changing Earth

Posts tagged “variable in physics

The Cosmic Perspective

“For you were made from dust, and to dust you shall return.”
Genesis 3:19

The Hubble Space Telescope, launched in 1990 and repaired for the last time in 2009, has led to some of the most important discoveries astrophysics has ever made.  The HST has helped constrain the value of the Hubble Constant, a variable in physics that determines the rate of expansion of the universe; it has helped refine estimates about the age of the universe; it has observed the earliest stages of planetary development, the proplyds (short for proto-planetary disks); it has helped to identify one of the most mysterious pheonomena in physics, dark energy, which may be responsible for the acceleration of the universe; and it has helped determine the nature of the relationship between galaxies and their black holes.