Results 31 to 40 of about 441,685 (256)
The Astrophysical Journal, 2023 Supernovae (SNe) that have been multiply imaged by gravitational lensing are rare and powerful probes for cosmology. Each detection is an opportunity to develop the critical tools and methodologies needed as the sample of lensed SNe increases by orders ...
J. D. R. Pierel +44 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric bias that could affect extragalactic Cepheids and the determination of the Hubble constant.
Adam G. Riess +9 more
doaj +1 more source
Ann.Rev.Astron.Astrophys. 38 (2000) 667-715, 2000 The Hubble space telescope observations of the northern Hubble deep field, and more recently its counterpart in the south, provide detections and photometry for stars and field galaxies to the faintest levels currently achievable, reaching magnitudes V ~ 30.
arxiv +1 more source
Proper Motions of Dwarf Spheroidal Galaxies from Hubble Space Telescope Imaging. III: Measurement for Ursa Minor [PDF]
, 2005 This article presents a measurement of the proper motion of the Ursa Minor dwarf spheroidal galaxy determined from images taken with the Hubble Space Telescope in two distinct fields.
arxiv +1 more source
[ITAL]HUBBLE SPACE TELESCOPE[/ITAL][ITAL]Hubble Space Telescope[/ITAL] Imaging of the Circinus Galaxy [PDF]
The Astronomical Journal, 2000 With 12 figures, to be published in the Astronomical Journal, September 2000 ...
Chris Simpson +7 more
openaire +2 more sources
Probing Ganymede’s Atmosphere with HST Lyα Images in Transit of Jupiter
The Planetary Science Journal, 2023 We report results from far-ultraviolet observations by the Hubble Space Telescope of Jupiter’s largest moon, Ganymede, transiting across the planet’s dayside hemisphere.
Lorenz Roth +8 more
doaj +1 more source
The Hubble Space Telescope Key Project to Measure the Hubble Constant [PDF]
Symposium - International Astronomical Union, 1999 A Joint Discussion on the extragalactic distance scale and the Hubble constant took place fifteen years ago, at the 1982 XVIIIth General Assembly of the IAU, held in Patras, Greece. At that time, the newest applications of infrared photometers to Tully-Fisher measurements (Aaronson 1983) and Cepheid distances (Madore 1983) were reported. CCDs were just
Robert C. Kennicutt +3 more
openaire +2 more sources
Tools for Learning—Promoting Reflection for Student Teachers' Development of PCK
Journal of Research in Science Teaching, EarlyView.ABSTRACT This paper investigates how the coherent integration of three different tools for reflection during a science methods course can contribute to student teachers' planning and enactment of science teaching, that is, their development of pedagogical content knowledge (PCK).
Pernilla Nilsson +1 more
wiley +1 more source
Late-time acceleration with steep exponential potentials
European Physical Journal C: Particles and Fields, 2017 In this letter, we study the cosmological dynamics of steeper potential than exponential. Our analysis shows that a simple extension of an exponential potential allows to capture late-time cosmic acceleration and retain the tracker behavior.
M. Shahalam +3 more
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The Astronomical Journal, 2023 We present an atmospheric analysis of LTT 9779 b, a rare planet situated in the hot-Neptune desert, that has been observed with Hubble Space Telescope (HST)/WFC3 with G102 and G141.
Billy Edwards +29 more
doaj +1 more source