De Nova Stella

Prior to 1572, the Aristotelian view of a perfect and unchanging heaven was accepted science for two thousand years. Unlike the turbulent terrestrial and meteorological events of the sublunary sphere, which contained Earth, the stars were fixed. Earlier in the century, Copernicus placed the sun in the center and Kepler described the ellipses of orbiting planets. It was an amateur Danish astronomer named Tycho Brahe who reported something that would further revolutionize the way that humans were to understand the cosmos. The appearance of a “new star” in 1572 disrupted the classical and religious view that the heavens (the sky beyond the moon and planets) were immutable. By using parallax, he was able to use measurements from different observatories to determine that the position of the new star did not change relative to other stars, which meant its distance must be well beyond the moon and not within the turbulence of the Earth’s currents.

Parallax can be used to measure the position or relative distance of objects from the observer. While its use in astrometry is obvious, I think it also provides an excellent metaphor for perspective. If 2 people are looking at the same thing and the distance between them is small, what they are looking at will appear similar. If 2 people are looking at the same thing and the distance between them is large, what they are looking at will appear to have to a different background and they will be observing a potentially different side of the same thing.

If we are talking about objects in (outer) space, the mathematics should resolve the perceived differences. But what if we are talking about the perception of events closer to home? The relative distance between people can be influenced by everything from age to ideology, gender to geography, and education to economy. It is essential to recognize that no one of us has access to or could even see the Big Picture. As scientific advances have and will continue to disrupt what we know about our place in the universe, it is my hope that we can together temper the light of new stars to illuminate the path forward.