The Rubin Observatory, positioned in Chile, will scan the sky to carry out a survey referred to as the Legacy Survey of Area and Time (LSST). This enormous survey will acquire an unlimited quantity of knowledge about galaxies to work out the place the “lacking mass” or darkish matter of the universe resides.
It should do that utilizing a method referred to as gravitational lensing. When an object has sufficient mass, it really bends spacetime in order that mild coming from behind the article is bent in a particular method. By seeing how sturdy this lensing impact is, scientists can determine how a lot mass the lensing object has. Meaning they will examine the mass in a galaxy which they will see to the mass it should have based on its lensing impact, and the distinction between these two signifies how a lot darkish matter is current.
This impact is refined, nonetheless, so to get a way of how a lot darkish matter is on the market, scientists want knowledge from 1000’s of galaxies. They need to observe methods throughout your entire sky to get an image of all of the darkish matter that is on the market.
For this, the Rubin Observatory wants a really highly effective telescope, with each a large area of view (which means it may see massive parts of the sky without delay) and excessive decision (which means it sees these areas in nice element). Most telescopes have one or the opposite. The Hubble Area Telescope, for instance, has very excessive decision however a small area of view. Rubin will have the ability to have each as a result of it has a particularly massive 8.4-meter mirror which is attached to the most important digital digital camera on this planet.