Results 61 to 70 of about 14,028,364 (216)

Closeby Habitable Exoplanet Survey (CHES). IV. Synergy between Astrometry and Direct Imaging Missions of the Habitable World Observatory for Detecting Earth-like Planets

open access: yesThe Astronomical Journal
The detection and characterization of habitable planets around nearby stars persist as some of the foremost objectives in contemporary astrophysics.
Chunhui Bao   +6 more
doaj   +1 more source

Spectrometric method for detecting exoplanets as another test to verify the invariance of the velocity of light [PDF]

open access: yesMoscow University Physics Bulletin, 2011
Hypothetical influences of variability of light velocity due to the parameters of the source of radiation, for the results of spectral measurements of stars to search for exoplanets are considered. Accounting accelerations of stars relative to the barycenter of the star - a planet (the planets) was carried out.
Mushailov, B. R., Teplitskaya, V. S.
openaire   +2 more sources

The Great Cosmic Silence: What Does the Fermi Paradox Tell About the Future of Humanity?

open access: yesGlobal 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

The NASA Exoplanet Archive and Exoplanet Follow-up Observing Program: Data, Tools, and Usage

open access: yesThe Planetary Science Journal
The NASA Exoplanet Archive (NEA) and the Exoplanet Follow-up Observing Program service are two widely used resources for the exoplanet community. The NEA provides a complete and accurate accounting of exoplanetary systems published by NASA missions and ...
Jessie L. Christiansen   +19 more
doaj   +1 more source

TOI-4600 b and c: Two Long-period Giant Planets Orbiting an Early K Dwarf

open access: yesThe Astrophysical Journal Letters, 2023
We report the discovery and validation of two long-period giant exoplanets orbiting the early K dwarf TOI-4600 ( V = 12.6, T = 11.9), first detected using observations from the Transiting Exoplanet Survey Satellite (TESS) by the TESS Single Transit ...
Ismael Mireles   +33 more
doaj   +1 more source

Detection of Exoplanets Using the Transit Method

open access: yesThe George Washington University Undergraduate Review, 2018
7 pages, 6 figures Affiliation ...
openaire   +3 more sources

Reanalysis of SKR Source Crossed by Cassini: Loss Cone Electrons as a Secondary Source of Free Energy

open access: yesGeophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Saturn's Kilometric Radiation (SKR) is a powerful non‐thermal radio auroral emission produced by the Cyclotron Maser Instability (CMI), which generates waves close to the local cyclotron frequency in a highly magnetized plasma from mildly relativistic electrons.
B. Collet, L. Lamy, Y. Kasaba, N. Andre
wiley   +1 more source

A Planetary Illusion’s Funeral: Nondetection of a Gaia DR3 Exoplanet Candidate, and the Role of Intermediate-precision Radial Velocities in Gaia Exoplanet Follow-up

open access: yesThe Astronomical Journal
The detection of exoplanets using astrometry has long been an area of interest, but is fraught with challenges. The Gaia mission is fundamentally reshaping this field thanks to its unprecedentedly precise all-sky astrometric observations.
Alexander Venner   +6 more
doaj   +1 more source

The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory

open access: yesAstronomische Nachrichten, Volume 347, Issue 7, August 2026.
ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth   +20 more
wiley   +1 more source

Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function

open access: yesThe Astronomical Journal
Gravitational microlensing is a unique method for discovering cold planets across a broad mass range. Reliable statistics of the microlensing planets require accurate sensitivity estimates.
Yuxin Shang   +7 more
doaj   +1 more source

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