description GJ 436 b Overview
GJ 436 b is a Neptune-sized exoplanet orbiting the red dwarf star GJ 436, located approximately 33 light-years from Earth. Discovered in 2004 via radial velocity measurements and later confirmed as a transiting planet, it has a mass and radius similar to Neptune. The planet orbits very close to its star with a period of approximately 2.6 days. Observations by the Hubble Space Telescope detected a large cloud of hydrogen gas trailing the planet, interpreted as evidence of atmospheric escape.
help GJ 436 b FAQ
What kind of planet is GJ 436 b?
GJ 436 b is a Neptune-sized exoplanet orbiting the red dwarf star GJ 436. Its mass and radius are broadly similar to Neptune, but it orbits a different type of host star.
How far is GJ 436 b from Earth?
The GJ 436 system is approximately 33 light-years away. That relative proximity has made GJ 436 b a useful target for transit and atmospheric studies.
How was GJ 436 b discovered?
It was first detected in 2004 through measurements of the star's radial velocity, which revealed the star's motion caused by an orbiting planet. Later transit observations confirmed that the planet passes across the face of GJ 436.
Does GJ 436 b transit its star?
Yes, GJ 436 b is a transiting planet, meaning it periodically passes between Earth and its host star. Those transits let astronomers measure the planet's radius and study how starlight interacts with its atmosphere.
explore Explore More
Similar to GJ 436 b
ui.x_see_all arrow_forward
Reviews & Comments
Write a Review
Be the first to review
Share your thoughts with the community and help others make better decisions.
