Results 11 to 20 of about 441,685 (256)
Design and Preliminary Ground Experiment for Deployable Sunshade Structures of a Modular Space Telescope [PDF]
SensorsOn-orbit assembling space telescope (OAST) is one of the most feasible methods to implement a large-scale space telescope. Unlike a monolithic space telescope (such as Hubble Space Telescope, HST) or a deployable space telescope (such as James Webb Space
Ye Kuang +4 more
doaj +2 more sources
New Estimates of Nitrogen Fixation on Early Earth [PDF]
LifeFixed nitrogen species generated by the early Earth’s atmosphere are thought to be critical to the emergence of life and the sustenance of early metabolisms.
Madeline Christensen +4 more
doaj +2 more sources
Debris disk color with the Hubble Space Telescope [PDF]
Astronomy & Astrophysics, 2023 Context. Multiwavelength scattered light imaging of debris disks may inform dust properties including typical size and mineral composition. Existing studies have investigated a small set of individual systems across a variety of imaging instruments and filters, calling for uniform comparison studies to systematically investigate dust properties.
Ren, Bin +16 more
openaire +6 more sources
The First Weak-lensing Analysis with the James Webb Space Telescope: SMACS J0723.3–7327
The Astrophysical Journal, 2023 Utilizing the James Webb Space Telescope Early Release NIRCam Observations, we perform a weak-lensing analysis of the massive galaxy cluster SMACS J0723.3–7327 ( z = 0.39).
Kyle Finner +3 more
doaj +1 more source
PHANGS–JWST First Results: A Combined HST and JWST Analysis of the Nuclear Star Cluster in NGC 628
The Astrophysical Journal Letters, 2023 We combine archival Hubble Space Telescope and new James Webb Space Telescope imaging data covering the ultraviolet to mid-infrared regime to morphologically analyze the nuclear star cluster (NSC) of NGC 628, a grand-design spiral galaxy.
Nils Hoyer +30 more
doaj +1 more source
PACMan2: Next Steps in Proposal Review Management
The Astronomical Journal, 2023 With the start of a new Great Observatories era, there is renewed concern that the demand for these forefront facilities, through proposal pressure, will exceed conventional peer-review management’s capacity for ensuring an unbiased and efficient ...
Louis-Gregory Strolger +7 more
doaj +1 more source
Jovian Magnetospheric Injections Observed by the Hubble Space Telescope and Juno
Geophysical Research Letters, 2023 We compare Hubble Space Telescope observations of Jupiter's FUV auroras with contemporaneous conjugate Juno in situ observations in the equatorial middle magnetosphere of Jupiter.
J. D. Nichols +15 more
doaj +1 more source
Attitude Control and Parameter Optimization: A Study on Hubble Space Telescope
Measurement Science Review, 2023 In this work, we build a satellite attitude Proportional-Integral-Derivative (PID) controlled system by using the Hubble Space Telescope (HST) parameters as a reference and tune its controller parameters using various tuning methods.
Sayin Emre +2 more
doaj +1 more source
The High-energy Spectrum of the Young Planet Host V1298 Tau
The Astronomical Journal, 2023 V1298 Tau is a young pre-main-sequence star hosting four known exoplanets that are prime targets for transmission spectroscopy with current-generation instruments. This work pieces together observations from the NICER X-ray telescope, the Space Telescope
Girish M. Duvvuri +6 more
doaj +1 more source
The Astronomical Journal, 2023 The diffuse, unresolved sky provides most of the photons that the Hubble Space Telescope (HST) receives, yet remains poorly understood. The HST Archival Legacy program SKYSURF aims to measure the 0.2–1.6 μ m sky surface brightness (sky-SB) from over 140 ...
Rosalia O’Brien +24 more
doaj +1 more source