Simulated Star Mission
NASA is gearing up to launch an innovative payload about the size of a toaster, equipped with eight lasers, as part of its $19.5 million Landolt mission. This artificial star will mimic celestial objects like stars and supernovas, helping scientists achieve more accurate measurements of real stars.
The primary goal is to improve our understanding of stellar brightness by over tenfold, which is crucial for studying distant planets and dark energy, the force driving the universe’s accelerated expansion.
Improving Stellar Measurements
David Ciardi, deputy director of the NASA Exoplanet Science Institute, explains, “Even with today’s modern instruments, measurements of the true brightness of stars have only been known to a few percent. Landolt will enable an improvement in those measurements by more than a factor of ten.” This advancement will enhance our knowledge of stars and the planets orbiting them.
Legacy of Alro Landolt
Named after astronomer Alro Landolt, known for his stellar brightness catalogs, this mission honors his contributions to astronomy. Daniel Huber from the University of Hawaii remarked, “His last name is famous in the whole astronomy community.”
Mission and Future Impact
Set to launch in 2029, the spacecraft will orbit 22,236 miles above Earth, maintaining a fixed position. By comparing the brightness of this artificial star to distant stars, scientists aim to refine stellar brightness catalogs and study the universe’s expansion rate.
Jamie Tayar from the University of Florida emphasizes the mission’s fundamental nature, stating, “The goal is to figure out, for other planets orbiting other stars, whether they too could have oceans where life could presumably arise and live.”