Loading…
Loading contentLoading…
Loading contentThe episodes in which accumulated anomalies — observations that will not fit the old picture — build until the framework breaks and a new one takes its place. Astronomy has driven several of the largest revolutions in all of science.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.