The luvoir is the successor of james webb space telescope. The Large Ultraviolet Optical Infrared Surveyor, commonly known as LUVOIR, is a multi-wavelength space telescope concept being developed by NASA under the leadership of a Science and Technology Definition Team. The current LUVOIR-B architecture adopts JWST design heritage, essentially being an incrementally larger variant of the JWST, which has a 6.5 m segmented main mirror. The Large UV/Optical/IR Surveyor (LUVOIR) is a concept for a highly capable, multi-wavelength space observatory with ambitious science goals. This mission would enable great leaps forward in a broad range of science, from the epoch of reionization, through galaxy formation and evolution, star and planet formation, to solar system remote sensing. LUVOIR also has the major goal of characterizing a wide range of exoplanets, including those that might be habitable - or even inhabited. LUVOIR is one of four Decadal Survey Mission Concept Studies initiated in Jan 2016. The study extended over 3.5 years and was executed by the Goddard Space Flight Center, under the leadership of a Science and Technology Definition Team (STDT) drawn from the community. LUVOIR will search for habitable conditions and signs of life on dozens of potentially habitable worlds beyond our Solar System. The results of this search will bring a wealth of data on the atmospheric composition and surface conditions of rocky planets in the habitable zones of a variety of stars. These data will revolutionize our understanding of planet-scale habitability, and will allow the first assessments of the frequency with which global biospheres arise on habitable worlds. Confident life-detection requires access to a wide range of molecules, which demands direct spectra with broad wavelength coverage from the near-UV to the near-infrared. The LUVOIR telescope and starlight suppression system can span these wavelengths and access the important constituents of planetary atmospheres, including water, molecular oxygen, ozone, carbon dioxide, and methane. When we look at the Solar System, it seems delicately balanced to produce a living world. How do we understand the Solar System in the broader context of planetary systems. By studying in detail the wide diversity of exoplanets, we will be able to develop, test, and refine theories of planetary atmospheric processes, including escape, greenhouse, and photochemical effects, under a range of conditions. Our understanding of how planetary surface temperature, climate, and atmospheric structure are influenced by a combination of incident solar flux, cloud and haze physics, and atmospheric composition has thus been profoundly informed by comparative planetary studies. LUVOIR will have the ability to characterize hundreds of transiting and directly imaged planets and will revolutionize our understanding of all classes of extrasolar planets and the common threads that connect them. There are many things still to be discovered and understood about the bodies within the Solar System. LUVOIR can provide up to about 25 km imaging resolution in visible light for the Jupiter system, permitting detailed monitoring of atmospheric dynamics in Jupiter, Saturn, Uranus, and Neptune over long timescales. Sensitive, high resolution imaging and spectroscopy of Solar System comets, asteroids, moons, and Kuiper Belt objects that will not be visited by spacecraft in the foreseeable future can provide vital information on the processes that formed the Solar System ages ago. The search for life also takes place closer to home. Over the last decades, we have discovered that several moons of the outer Solar System - like Europa and Enceladus - have liquid water beneath their icy surfaces. LUVOIR has an important role to play by determining the currently unknown strength and frequency of geyser activity from Europa and Enceladus, through high resolution monitoring of icy moons. The scope of astrophysics investigations that LUVOIR can do is truly vast, covering all the topics addressed with Hubble and more. Experiments extremely difficult or impossible to execute with Hubble's 2.4-meter diameter mirror become easy and possible with LUVOIR, including explorations of the far reaches of space and time. Clusters of galaxies are strung out along dark matter webs like jewels in space, but many unanswered questions remain about the nature of the cosmos. Such questions include the nature of dark matter and how galaxy formation works on small size scales. LUVOIR can address these questions by imaging fainter and smaller structures in the universe than ever before. Additionally, it will be able to map the distribution of dark matter in the nearby universe, and study counterparts to gravitational wave sources in electromagnetic radiation. Much of our understanding of galaxy formation and evolution comes from studying the abundances and kinematics of resolved stellar populations. Currently, this is only possible for galaxies in our local group, limiting the types of galaxies that can be studied. LUVOIR's unprecedented resolution will resolve stellar populations in star-forming regions of galaxies at distances up to 10-25 mega-parsecs, accessing more diverse galaxy morphologies, sizes, and cluster environments. In addition, gas flows between the galaxies in the intergalactic medium to be recycled into new stars; much of this process is yet unobserved as it demands the type of sensitive ultraviolet spectroscopy LUVOIR will be capable of. We do not yet have general theories to explain the fundamental outcome of the star formation process or the initial stellar mass function (IMF), which describes how many stars of which masses are born. Stars and protoplanetary disks are small in the grand scheme of things; currently, we can only study them in detail when they are relatively nearby. To increase the numbers we can study in different galactic and extragalactic environments, observations at higher spatial resolution are needed, which demands larger telescopes. In addition, the ultraviolet capability provided by LUVOIR is vital for characterizing the materials available for formation of planets and their atmospheres. One of the primary science goals of LUVOIR is to detect and characterize habitable exoplanets around nearby stars. To achieve exoplanet yields large enough to enable a statistical study of habitability requires a large aperture telescope, greater than 8 meters in diameter. Any coronagraph instrument that is used to execute the exoplanet survey and characterization must have excellent performance with this telescope. Several key technology components will need to be matured to enable such observations: optimized coronagraph masks, ultra-stable opto-mechanical systems, and low noise, photon-counting visible and near-infrared detectors. Observing programs aligned with the Cosmic Origins scientific objectives of LUVOIR demand a variety of UV imaging and spectroscopic capabilities, on sources ranging from protostars in local molecular clouds to star-forming galaxies at z=3. These instruments will require advances in large format, high sensitivity, and high-dynamic range (HDR) UV detectors, as well as highly uniform, high-reflectivity broadband mirror coatings.

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