It was the first hot Neptune discovered with certainty (in 2007) and was among the smallest-known transiting planets in mass and radius, until the much smaller Kepler exoplanet discoveries began circa 2010. In December 2013, NASA reported that clouds may have been detected in the atmosphere of GJ 436 b. [8][9][10][11]

Oct 24, 2024 · GJ 436 b is a Neptune-like exoplanet that orbits a M-type star. Its mass is 22.1 Earths, it takes 2.6 days to complete one orbit of its star, and is 0.0291 AU from its star. Its discovery was announced in 2004.

Gliese 436 is a red dwarf located 31.9 light-years (9.8 parsecs) away in the zodiac constellation of Leo. It has an apparent visual magnitude of 10.67, [3] which is much too faint to be seen with the naked eye. However, it can be viewed with even a modest telescope of 2.4 in …

In the recently published (22 April 2010) Nature article titled “Possible thermochemical disequilibrium in the atmosphere of the exoplanet GJ 436b” by Stevenson et al., we suggest that GJ 436b’s atmosphere is abundant in CO and deficient in methane (CH 4) by a factor of ~7,000.

A Hubble Space Telescope transit light curve for GJ436b Bean et al. 2008 | Reference Overview Improved Parameters for Extrasolar Transiting Planets

Apr 22, 2010 · NASA's Spitzer Space Telescope has found evidence that a hot, Neptune-sized planet orbiting a star beyond our sun lacks methane — an ingredient common to many planets in our own solar system.

Dec 20, 2017 · Around 22 times the mass of Earth, GJ436b orbits its sun at a much closer distance than Neptune's and even Earth's, just 4 million kilometres (2.5 million miles).

The polar orbit of the warm Neptune GJ436b seen with VLT/ESPRESSO 2022 BOURRIER V., ZAPATERO-OSORIO M.-R., ALLART R., ATTIA O., CRETIGNIER M. et al. Astron. & Astrophys.

Jun 24, 2015 · Here we report that in the ultraviolet the Neptune-mass exoplanet GJ 436b (also known as Gliese 436b) has transit depths of 56.3 ± 3.5% (1 σ), far beyond the 0.69% optical transit depth.

Mar 11, 2022 · The consistent results between these three techniques, and with published results from HARPS/HARPS-N data, confirm the polar orbit of GJ436b and support the hypothesis that its origin lies in Kozai migration.