Results 61 to 70 of about 329,644 (212)
Scaling K2. VI. Reduced Small-planet Occurrence in High-galactic-amplitude Stars
The Astronomical Journal, 2023 In this study, we performed a homogeneous analysis of the planets around FGK dwarf stars observed by the Kepler and K2 missions, providing spectroscopic parameters for 310 K2 targets —including 239 Scaling K2 hosts—observed with Keck/HIRES.
Jon K. Zink +15 more
doaj +1 more source
The Great Cosmic Silence: What Does the Fermi Paradox Tell About the Future of Humanity?
Global Policy, Volume 17, Issue 4, Page 553-565, September 2026.ABSTRACT This article examines how institutional time horizons shape the long‐term survival prospects of human technological civilisation. While research on global catastrophic and existential risks has expanded, the temporal structures of political‐economic institutions remain underexamined.
Heikki Patomäki
wiley +1 more source
Exeter Archaeology Archive Project
, 2015 The Exeter Archaeology Archive Project was created with the aim of securing, consolidating and enhancing the archives derived from excavations in Exeter undertaken between 1970 and 1990.
Cotswold Archaeology +1 more
core +1 more source
Images from an Evaluation at Combe Cross, Filham, Ivybridge, Devon 2020
, 2021 This collection comprises of site photographs taken during an archaeological evaluation carried out by Cotswold Archaeology at Combe Cross, Filham, Ivybridge, Devon in March ...
Cotswold Archaeology
core +1 more source
The Astrophysical JournalAn examination of 109,276 spectra of low-mass stars in the Sloan Digital Sky Survey (SDSS) data archive, collected pre-2010, provides a broad collection of K/M (sub)dwarfs tracing the local ( d ≲ 250 pc) population of the thin-disk, thick-disk, and halo,
Emma Galligan, Sébastien Lépine
doaj +1 more source
Risk Analysis, Volume 46, Issue 9, September 2026.ABSTRACT The Fermi paradox may partly reflect technological self‐destruction acting as a Great Filter during post‐industrial development. Because the empirical record consists of a single civilization observed over an eighty‐year nuclear age, the exercise reported here is best understood as a structured, historically anchored scenario analysis rather ...
Vincenzo Alfano
wiley +1 more source
Worcestershire Archaeology Research Reports
, 2019 This collection comprises publications from the Worcestershire Archaeological Research Reports series. Worcestershire Archaeological Research Reports (WARR) is a series of digital reports produced by Worcestershire Archaeology, part of Worcestershire ...
Worcestershire Archive and Archaeology Service
core +1 more source
Images from an Archaeological Excavation at Greet Road, Winchcombe, Gloucestershire 2021
, 2021 This collection comprises images from an archaeological excavation at the Proposed Recreation Ground, Greet Road, Winchcombe, Gloucestershire In January 2021, carried out by Cotswold Archaeology.
Cotswold Archaeology
core +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract Cosmic rays (CRs) are energetic particles originating from galactic and extragalactic sources. When arriving into the solar system and the Sun's heliosphere, they are diverted and modulated by the magnetic activity of the Sun. This modulation can be quantified by the modulation parameter ϕ $\phi $ determined with the Force‐field approximation (
Pauli Väisänen +5 more
wiley +1 more source
The Astrophysical JournalThe observed chemical diversity of Milky Way stars places important constraints on Galactic chemical evolution and the mixing processes that operate within the interstellar medium. Recent works have found that the chemical diversity of disk stars is low.
Catherine Manea +5 more
doaj +1 more source