What was the long-standing estimate for the number of galaxies in the observable universe before the 2010s revision?
Answer
100 to 200 billion
For a long time, astronomers estimated the observable universe contained between one hundred to two hundred billion galaxies, based on observations made with earlier, less powerful telescopes.
Related Questions
What was the long-standing estimate for the number of galaxies in the observable universe before the 2010s revision?What is the approximate current estimate for the number of galaxies in the observable universe derived from Hubble Ultra Deep Field modeling?What technique do astronomers primarily use to estimate the total number of galaxies?Which famous images resulted from the Hubble telescope staring intensely at minuscule regions of the sky for hundreds of hours?How did researchers significantly increase the galaxy count estimate based on HUDF data?To what spatial region does the 2 trillion galaxy estimate specifically apply?The boundary of the observable universe is determined by how long it takes for light to reach Earth since which major cosmic event?Which structural types of galaxies are explicitly mentioned as comprising the cosmic population besides large spirals like the Milky Way?What primary advantage does the James Webb Space Telescope (JWST) offer in galaxy counting compared to previous instruments?How much greater is the 2 trillion galaxy estimate compared to the preceding standard estimate of 100 to 200 billion?