Results 81 to 90 of about 1,775 (210)

Doomsday or Multiverse Bias

open access: yesPhilosophy and Phenomenological Research, EarlyView.
ABSTRACT Bayesian epistemology faces serious challenges when dealing with self‐locating evidence. This paper argues that, given two modest assumptions about how confirmation should work (Patterning and Live Centers), Bayesianism faces an unavoidable dilemma.
Yoaav Isaacs
wiley   +1 more source

Satellite Galaxy Velocity Dispersions in the SDSS and Modified Gravity Models

open access: yesGalaxies, 2014
The Sloan Digital Sky Survey (SDSS) provides data on several hundred thousand galaxies. The precise location of these galaxies in the sky, along with information about their luminosities and line-of-sight (Doppler) velocities, allows one to construct a ...
John W. Moffat, Viktor T. Toth
doaj   +1 more source

Computers in Our Cosmos: Intersections in Geographies of Care, Abolition Geographies and Worker Movements

open access: yesTransactions of the Institute of British Geographers, EarlyView.
ABSTRACT AI assistants on spacecrafts. Netflix streamed through inter‐planetary communication networks. Colonies on Mars by 2050. While the glamorous public–private ventures into outer space curate discussions on the technical specificities of these proposed projects, this paper reorients discussions on such developments through critical frameworks of ...
Yung Au
wiley   +1 more source

Low‐dose X‐ray radiation induces an adaptive response: A potential countermeasure to galactic cosmic radiation exposure

open access: yesExperimental Physiology, EarlyView.
Abstract Space exploration involves many dangers including galactic cosmic radiation (GCR). This class of radiation includes high‐energy protons and heavy ionizing ions. NASA has defined GCR as a carcinogenic risk for long‐duration space missions. To date, no clear strategy has been developed to counter chronic GCR exposure.
Siena Edwards   +3 more
wiley   +1 more source

Constraining the Low-mass End of the Stellar-to-halo Mass Relation with Surveys of Satellite Galaxies

open access: yesThe Astrophysical Journal
The abundance of satellite galaxies is set by the hierarchical assembly of their host halo. We leverage this to investigate the low-mass end ( M _H < 10 ^11 M _⊙ ) of the stellar-to-halo mass relation (SHMR), which is key to constraining theories of ...
J. Sebastian Monzon   +2 more
doaj   +1 more source

Planes of Satellite Galaxies

open access: yes, 2019
Both the Milky Way and the Andromeda galaxy are known to host highly flattened planes of satellite galaxies. These display coherent kinematics, which is consistent with many of their satellite galaxies co-orbiting along the structures. In addition, we recently discovered that a similar satellite structure around Centaurus A also shows coherent ...
openaire   +1 more source

Women in space: A review of known physiological adaptations and health perspectives

open access: yesExperimental Physiology, EarlyView.
Abstract Exposure to the spaceflight environment causes adaptations in most human physiological systems, many of which are thought to affect women differently from men. Since only 11.5% of astronauts worldwide have been female, these issues are largely understudied.
Millie Hughes‐Fulford   +4 more
wiley   +1 more source

50% body weight loading reduces stature increases and lumbar disc expansion from 4 h hyper‐buoyancy floatation versus 15 min sitting upright

open access: yesExperimental Physiology, EarlyView.
Abstract Microgravity is associated with stature increases, back pain and post‐flight intervertebral disc (IVD) herniation. This study aims to determine whether 30 s seated 50% body weight (BW) axial loading is comparable to 15 min sitting upright in 1 g upon changes in stature, anterior lumbar IVD height (via ultrasound), passive vertebral stiffness ...
David Marcos‐Lorenzo   +6 more
wiley   +1 more source

Impact of the Cosmic Web on the Properties of Galaxies in IllustrisTNG Simulations

open access: yesThe Astrophysical Journal
We investigate the influence of the cosmic web on galaxy properties in the IllustrisTNG simulations. To disentangle the effects of galaxy groups and cosmic filaments, we divide the cosmic web environment into four categories: group, group-dominated ...
Guangyao Yu   +5 more
doaj   +1 more source

Stellar streams around dwarf galaxies in the local Universe

open access: yesAstronomy & Astrophysics
Context. While mergers between massive galaxies and their dwarf satellites have been well studied, the properties of dwarf–dwarf satellite mergers are not well constrained.
Sakowska Joanna D.   +8 more
doaj   +1 more source

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