Astrometry
Branch of astronomy involving positioning and movements of celestial bodies
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We include updates on Astrolabe, Parallax, United States Naval Observatory, Inertial frame of reference, Henrietta Swan Leavitt, Frame of reference, Ephemeris, Cepheid variable, Celestial mechanics, Cosmic distance ladder, Angular diameter, Stellar parallax, Rotating reference frame, Proxima Centauri c, Great conjunction, Proper motion ... and more.
| 2025 |
HR 8799 e
First direct detection of carbon dioxide in the planet's atmosphere was announced, marking a significant milestone in exoplanet atmospheric research.
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| 2025 |
51 Eridani b
Detection of water and carbon dioxide in the planet's atmosphere was announced, marking the second direct detection of CO2 in an exoplanet's atmosphere.
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| February 2025 |
Epsilon Eridani b
James Webb Space Telescope completed observations of Epsilon Eridani, aiming to capture a direct image of the planet when the angular separation between the star and planet was at its maximum.
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| December 2024 |
Epsilon Eridani b
James Webb Space Telescope began observations of Epsilon Eridani, targeting direct imaging and spectral analysis of Epsilon Eridani b.
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| 2021 |
HR 8799 e
Detection of water and carbon monoxide in the planet's atmosphere was announced, along with an astrometric measurement of the planet's mass.
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| March 27 2019 |
HR 8799 e
European Southern Observatory announced the first direct observation of an exoplanet using optical interferometry via the GRAVITY instrument on the Very Large Telescope. The observations revealed a complex atmosphere with iron and silicate clouds in a planet-wide storm, and discovered an unexpected carbon monoxide to methane ratio.
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| January 2019 |
Epsilon Eridani b
A research paper was published refining the orbital eccentricity of Epsilon Eridani b to around 0.07, significantly lower than previous estimates, and providing a more precise mass estimate of 0.78 Jupiter masses.
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| December 2015 |
Epsilon Eridani b
James Ott, a 14-year-old, won the International Astronomical Union's NameExoWorlds contest by submitting the names 'AEgir' for the planet and 'Ran' for its host star, giving the exoplanetary system its official mythological names.
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| 2013 |
HR 8799 e
Near infrared spectroscopy at Palomar Observatory revealed evidence of methane and acetylene in the planet's atmosphere, with no signs of ammonia or carbon dioxide.
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This contents of the box above is based on material from the Wikipedia articles HR 8799 e, 51 Eridani b & Epsilon Eridani b, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.