Why NASA's New Telescope will be a Game Changer

Added: 2026-05-05

[00:00:02]Hey guys, welcome back to my channel.

[00:00:03]So, a few of you actually suggested this topic for me to cover today, and I have to say after watching NASA's press conference about this thing, I'm in. I'm all in. It sounds amazing, gamechanging, and all of the buzzwords. I am, of course, talking about the Nancy Grace Roman Space Telescope, which NASA unveiled last week. And I have to admit that before this press conference, I knew nothing about this telescope. And maybe some of you didn't either, but whether you did or didn't, for today's video, I'm going to go over why NASA and the larger space community are so excited by this particular telescope because honestly, it may be showing us images of the universe that we have never seen before. So, on April 21st, 2026, NASA invited the press to look at the fully assembled Nancy Grace Roman Space Telescope, which is now ready to join the ranks of the Great Observatories in orbit ahead of its September 2026 launch. The telescope is named for NASA's first chief of astronomy in the 1960s and 70s and the first woman to hold an executive position at NASA, Nancy Grace Roman.

[00:01:13]Now, you may be thinking, "Woo, Marion, another telescope up in the sky for NASA. Like, what's the big deal? I mean, we've got Hubble and James Webb and a few others up there right now. So, what is so special about yet another telescope?" Well, the reason is pretty simple. Because this telescope is going to provide us with a wideeyed panoramic view of the universe that is hundreds of times larger than previous telescopes.

[00:01:40]And just think about that for a moment.

[00:01:41]I mean, we've all been pretty blown away by the images from James Webb in recent years, and now we are going to expand upon that by hundreds of times.

[00:01:52]Telescopes like Hubble and James Webb focus on deep narrow snapshots of specific targets. Roman is designed to map vast areas of the sky with the same level of detail. So it is essentially acting like a highdefinition wide angle lens of the cosmos. And having those kinds of images can answer a lot of questions that we have about the universe. But before I get into that, let's talk about how Roman is going to bring up these images. So Roman, fully assembled will be about 42 feet or about 13 m long and about 14 feet or 4 1/2 m wide. The mirror on Roman is about the same size as the mirror on Hubble, nearly 8 feet in diameter. However, Roman's mirror will weigh 80% less than Hubble due to advancements in lightweight glass technology. And this pretty large telescope will carry just two instruments. The first is its wide field instrument meant to capture a huge portion of the sky all at once. NASA compares the size of its field of view to that of a full moon. It's roughly a 100 times wider than the largest images Hubble can capture. This instrument will be paired with an array of 18 individual detectors, each capable of capturing 4,096x 4,096 pixels. The result is that a complete Roman telescope survey image will be enormous. NASA astronomer Julie Mckenry said that using 4K displays to display it at single pixel resolution would require enough TVs to cover the surface of El Capitan in Yusede. Hence the enormous bandwidth needed to get those images back to Earth. It will then send about 1.4 terabytes of data back to Earth every day. And that's a pretty big upgrade in just one year. It will match 30 years of Hubble's data collection.

[00:04:01]The second instrument on Roman is a coronagraph, which blocks out a star in the center of the field of view, allowing nearby orbits to be directly imaged, even if they are far dimmer than the star. And the effectiveness of the coronagraph will determine just how close to the star an object can be imaged. And what's unique about this is that the coronagraph flying on the Roman telescope will be the first time one with active elements, components that can progressively adjust to decrease the light coming from the star will be used on a space-based observatory. And scientifically, the aim of this instrument is to image exoplanets in distant orbits from their stars. NASA administrator Jared Isaacman said during the press conference, "Its surveying capabilities are over a thousand times faster than Hubble and can chart 200 times more sky in a single image. What would take Hubble 2,000 years to process, Roman can do in one year. The images it captures will be so large there is not a screen in existence large enough to show them." And this goes back to the Roman answering questions about the universe thing. NASA is interested in imaging exoplanets in distant orbits because most of the 6,000 plus exoplanets discovered so far are biased towards worlds very close to their stars. By looking at planets in wider orbits, NASA aims to fill critical gaps in our understanding of how solar systems are formed and where life might actually exist. And Roman's instruments mean that scientists don't have to be quite as picky at which patch of sky they're looking at. They can just take a big survey and then find a cool lead for them to zoom in on. This offers Roman the ability to catch events that transpire very quickly and increases the chances that scientists can witness remarkable supernovas, colliding neutron stars, and other easy to miss phenomena right as they happen. Dominic Benford, a program scientist for the Roman telescope, told space.com, "So, we're going to see thousands of supernova, and some of these are going to be further away than any supernova we've ever seen before. We'll trace the history of the universe through exploding stars." And because of this wide field of view, Roman will be able to rapidly image tons of galaxies, generating detailed 3D vistas of the cosmos. It can therefore be able to show us things like the dynamics of different galaxies and tracking the universe's expansion, the two main ways that we investigate dark energy and dark matter. Julie McHenry said, "We'll also study how the universe itself has expanded over time, and these are the keys to unlocking the fundamental nature of dark matter, dark energy, the fabric of the universe itself." So, I got to say, it seems like a lot of bang for your buck. And speaking of buck or bucks, the Roman telescope came in under budget and 8 months ahead of schedule, which is pretty impressive. So, now that Roman is complete and unveiled, what now? Well, the next step is to ship Roman to the launch site at the Kennedy Space Center and undergo any final launch related testing. A decent amount of pre-launch testing has already been done on Roman, including being blasted by extreme sounds, shaken up a whole bunch, being exposed to extreme heat and cold, and you know, standard NASA stuff. Jeremy S.

[00:07:39]Perkins, observatory integration and test scientist for Roman, told space.com, "Most of the stuff that's left are the final checkouts and the final wrap-ups. And once all final aspects of testing are squared away, NASA has chosen SpaceX's Falcon Heavy rocket to carry Roman to space in September 2026. Once in space, after separating from the rocket, Roman will head to a stable point about a million miles away from Earth called Lraange Point2 or L2. This is a popular spot to end up because it allows spacecraft to remain shielded from the sun's heat while still orbiting in such a way that mission control can easily communicate.

[00:08:19]And for NASA, what's really exciting about Roman is the unexpected. Julie McHenry said, "I very much hope and in fact expect that the most exciting science from Roman is going to be the things that we didn't expect that we couldn't predict, but that will set the new deep questions for future missions to address." So, what do you guys think about Roman? I mean, this idea of an HD wide-angle lens looking into the cosmos does sound pretty good, right? as does under budget and ahead of schedule. Well done there, guys. But for me, it's really the idea of capturing a supernova from start to finish. That's like the most exciting. I don't think I can even wrap my mind around what that might really look like. So, 2026, man, just keeps delivering on all the exciting space stuff. It's only April, you guys.

[00:09:15]Well done, 2026. I'm I'm very impressed so far. But let me know what you guys think in the comments below. Okay, that's it for now. I'm still thinking about that supernova. [laughter] That's it for now. Thank you so much for watching, guys. And as always, I will see you in the next video.

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