description HR 8799 d Overview
HR 8799 d is a gas giant exoplanet located approximately 129 light-years from Earth. It’s notable as one of the first planets directly imaged around an A-type star and part of a multi-planet system discovered through direct imaging techniques. This planet orbits a young, Sun-like star and offers valuable data for astronomers studying planetary formation and evolution, particularly those researching systems with multiple planets.
help HR 8799 d FAQ
How was the exoplanet HR 8799 d discovered?
HR 8799 d was discovered using direct imaging techniques, rather than the more common transit or radial velocity methods. This allowed astronomers to directly capture the light of the gas giant, separate from its host star, using large ground-based telescopes.
How far away is the HR 8799 planetary system from Earth?
The HR 8799 system is located approximately 129 light-years away from Earth. It resides in the constellation Pegasus and is relatively close in cosmic terms, which helped facilitate the direct imaging of its planets.
What kind of star does HR 8799 d orbit?
HR 8799 d orbits a young, A-type star named HR 8799. This host star is estimated to be only about 30 million years old, making it significantly younger than our Sun.
Is HR 8799 d a rocky planet?
No, HR 8799 d is a massive gas giant exoplanet. It is estimated to have a mass of about 10 times that of Jupiter, meaning it is completely uninhabitable for life as we know it and lacks a solid surface.
explore Explore More
Similar to HR 8799 d
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.
