Comet Tsuchinshan–ATLAS and the Age of the Solar System
Posting may be sporadic this week.
Comet Tsuchinshan–ATLAS, so named because two observatories discovered it at almost the same time, dazzled the sky in late 2024. It has naturally prompted a great deal of discussion about orbits, eccentricities, and all that good stuff.
Biblical creationists have pointed out that short-term comets would have ceased to exist if the solar system was billions of years old. Comets orbit, burn off some of their mass near the sun, repeat and fade. Also, some comets have collisions, get ejected from the solar system, and have their orbits changed, so those disappear as well.
Comet Tsuchinshan-ATLAS, NASA / Eric Bordelon (usage does not imply endorsement of site contents) |
There were over a thousand precise pre-perihelion measurements of the changing position of Comet Tsuchinshan–ATLAS that spanned more than a year. This allowed accurate calculation of the orbit the comet was following as it approached the sun. Astronomers use the astronomical unit (AU) to measure distances in the solar system. The AU is the average distance between the earth and sun (93 million miles = 150 million kilometers).
You can read the full article (and see a couple of the author's photographs) at "What 2024’s Bright Comet May Reveal About the Age of the Solar System."