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This list of exoplanets discovered in 2023 is a list of confirmed exoplanets that were first reported in 2023. For exoplanets detected only by radial velocity, the listed value for mass is a lower limit. See Minimum mass for more information. Name Mass (M J) Radius (R J) Period (days) Semi-major axis (AU) Temp. (K) Discovery method Distance (ly) Host star mass (M ☉) Host star temp. (K ...
The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
On January 4, 2017, Psyche was selected for the 14th Discovery mission, with launch set for 2023. [12] In May 2017, the launch date was moved up to target a more efficient trajectory, to July 2022 aboard a SpaceX Falcon Heavy launch vehicle with a January 31, 2026 arrival, following a Mars gravity assist on May 23, 2023. [13]
NASA released the draft of the Announcement of Opportunity New Frontiers 5 on January 10, 2023. [44] On August 24, 2023, NASA announced that due to budgetary constraints enacted through the Fiscal Responsibility Act of 2023, the official release of the Announcement of Opportunity for New Frontiers 5 would be delayed to no earlier than 2026. [45]
On 1 November 2023, Lucy successfully flew by its first target, the main-belt asteroid 152830 Dinkinesh, at a relative speed of 4.5 km/s (2.8 mi/s). [59] On the following day, NASA released images from the flyby and announced the discovery of a small satellite orbiting Dinkinesh. [60]
14 April 2023 Jupiter/Ganymede orbiter [495] Chandrayaan-3: 14 July 2023 Lunar orbiter, lander and rover; first soft landing near the lunar South Pole [496] [497] Luna 25: 10 August 2023 Attempted lunar south pole lander (crashed into Moon) [498] [499] Aditya-L1: 2 September 2023 Sun-observing spacecraft at Sun–Earth L 1 [500] SLIM (LEV-1, LEV-2)
The planet orbits in the habitable zone of its star and has an equilibrium temperature of 234 K (−39 °C). [4] It was discovered by the Transiting Exoplanet Survey Satellite (TESS) in 2023; [5] according to the authors of the discovery paper, it is the first TESS discovery in the conservative habitable zone. [4]
Because of its highly elliptical orbit and the Sun's strong gravity, this effect is particularly pronounced for the Parker Solar Probe. During a perihelion on September 27, 2023, the spacecraft traveled at 394,736 miles per hour (176.5 km/s), fast enough to fly from New York to Tokyo in just over a minute. [14]