NASA is famous for delaying things, because when you do new things or experiment with new things, sometimes failures occur and delays occur, that's understandable, but in this case it's going to be launched earlier. It was planned to launch in 2027 and now NASA announces that they will launch this telescope in September 2026, 8 months earlier than previously planned and also under budget
Maybe this new NASA manager is putting NASA back on track and starting to do things the way they should be, looking for objectives and meeting them, the point is that this telescope is going to capture images 100 times larger and 1000 times faster than Hubble, it's not going to be like Hubble, it's going to be a survey telescope, I'll give you an example, snipers.
Although in the movies we see a solitary sniper, this is not the case, normally there are teams of three or at least two, there is the sniper with his weapon, there is the scout with binoculars to search for the objectives and once he detects the objective, he tells the sniper, "Hey, look at this one." and it is the sniper who then has to execute the action, this is a bit of that scheme, this type of telescope is a scout for large masses of data to the beast, it will map billions of galaxies, study dark matter, dark energy and detect thousands of exoplanets taking advantage of gravitational microlensing effects.
But then with that volume of data they will be used by precision telescopes like the James Webb to focus on those targets, especially exoplanets, for example, that is, the Roman is going to collect information on, for example, 1000 of these new planets and from that volume of information the astronomers will decide, "Hey, this is a good target. We are going to dedicate the time and means of the James Web so that it can focus on that target and we will have more data on exoplanets that have appeared in the global data of the Roman.
This telescope also has a very long history, it has taken a long time to move forward, they have changed the name in honor of the astronomer Nancy Grace Roman, who died in 2018, by the way, and who is known as the mother of the Hubble space telescope, she was the first head of astronomy at NASA and the first woman to hold an executive position at the agency, in the 60s and 70s she promoted the space astronomy program, what we now see as space telescopes and for that reason, Well, it is the perfect name for this telescope.
It will not be orbiting the Earth like Hubble does, but rather it will go to a Lagrange point, specifically the L2, which is 1.5 million km from the Earth, it is the same place where the James Web is, obviously they will not be glued to each other, but it is in that same area, the Lagrange point L2, because these points are strategic gravitational points, it is a stable point with the Sun, the Earth and the Moon that allows the telescope to always be in the same direction, which facilitates the cooling of the instruments and also makes it easier for the telescope to be stable without having to perform maneuvers to recalibrate the position. At these Lagrange points, the objects can remain there stably for a long time.
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