Results 31 to 40 of about 25,446 (221)
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract On December 2023, the Juno spacecraft made a flyby of Io above the northern hemisphere at a closest approach (CA) altitude of ∼1,500 km (PJ57). The Juno/Waves and Radio‐occultation measurements showed a surprising large electron density ∼28,000 cm−3 near closest approach.
V. Dols, F. Bagenal
wiley +1 more source
JWST COMPASS: NIRSpec/G395H Transmission Observations of TOI-776 c, a 2 R⊕ M Dwarf Planet
The Astronomical JournalThe atmospheres of planets between the size of Earth and Neptune at short orbital periods have been under intense scrutiny. Of the approximately dozen planets in this regime with atmospheres studied so far, a few appear to have prominent molecular ...
Johanna Teske +18 more
doaj +1 more source
Uranus' Long‐Term Thermospheric Cooling Is Unlikely to Be Primarily Driven by the Solar Wind
Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.Abstract Over the last 40 yrs, Uranus' thermospheric temperature has decreased by ∼8 K/yr. Here we show that this is less likely to be driven by solar wind kinetic power than previously thought. We determine that the solar wind kinetic power at Uranus has been increasing since the start of solar cycle 24 in 2009, while Uranus's thermospheric ...
Jamie M. Jasinski +5 more
wiley +1 more source
The Astronomical JournalExamining the detailed structure of galaxy populations provides valuable insights into their formation and evolution mechanisms. Significant barriers to such analysis are the nontrivial noise properties of real astronomical images and the point-spread ...
Alexandre Adam +5 more
doaj +1 more source
JWST/NIRCam Discovery of the First Y+Y Brown Dwarf Binary: WISE J033605.05–014350.4
The Astrophysical Journal Letters, 2023 We report the discovery of the first brown dwarf binary system with a Y dwarf primary, WISE J033605.05−014350.4, observed with NIRCam on JWST with the F150W and F480M filters.
Per Calissendorff +27 more
doaj +1 more source
Finding high-redshift dark stars with the James Webb Space Telescope
, 2010 The first stars in the history of the Universe are likely to form in the dense central regions of 10^5-10^6 Msolar cold dark matter halos at z=10-50. The annihilation of dark matter particles in these environments may lead to the formation of so-called ...
Broadhurst, Tom +9 more
core +3 more sources
Using a Cold Radiometer to Measure Heat Loads and Survey Heat Leaks [PDF]
, 2014 We have developed an inexpensive cold radiometer for use in thermal/vacuum chambers to measure heat loads, characterize emissivity and specularity of surfaces and to survey areas to evaluate stray heat loads.
Dipirro, M. +3 more
core +2 more sources
Faint White Dwarf Flux Standards: Data and Models
The Astronomical JournalFainter standard stars are essential for the calibration of larger telescopes. This work adds to the calibration spectra (CALSPEC) database of 19 faint white dwarfs (WDs) with all-sky coverage and V magnitudes between 16.5 and 18.7.
Ralph C. Bohlin +9 more
doaj +1 more source
Laser &Photonics Reviews, Volume 19, Issue 24, December 17, 2025.This study presents an improved technique for Localization Optoacoustic Tomography using experimentally‐derived effective point spread functions. The method significantly enhances sub‐pixel localization performance, with applicable potential to relatively under‐sampled scenarios and other imaging modalities, paving the way for new frontiers in super ...
Hongtong Li +11 more
wiley +1 more source
James Webb Space Telescope Project (JWST) Overview [PDF]
, 2008 This presentation provides an overview of the James Webb Space Telescope (JWST) Project. The JWST is an infrared telescope designed to collect data in the cosmic dark zone.
Dutta, Mitra
core +1 more source