UP 8799 popping out from behind a tree as long eastbound pusher on autorack duty... maybe... because most of the consist remains hidden behind the hills and across the unused lanes that …

2 天之前 · NASA’s James Webb Space Telescope has captured direct images of multiple gas giant planets within an iconic planetary system. HR 8799, a young system 130 light-years …

HR 8799 is a roughly 30 million-year-old main-sequence star located 133.3 light-years (40.9 parsecs) away from Earth in the constellation of Pegasus. It has roughly 1.5 times the Sun 's …

2 天之前 · HR 8799, a young system 130 light-years away, has long been a key target for planet formation studies. ... “We have other lines of evidence that hint at these four HR 8799 planets …

2 天之前 · First, the HR 8799 planets are offset toward bluer F430M – F410M colors than the field BDs by about half a magnitude. Second, despite their relatively similar NIR colors, the HR …

1 天前 · The newly detected carbon dioxide in one of the planets, HR 8799 e, shows there is a significant amount of heavy metals in the planet's atmosphere, which aligns with the leading, …

HR 8799 e is the fourth planet orbiting HR 8799 in order of discovery. It is a young, hot and massive gas giant, and is fairly close to its star, lying just between the orbits of Saturn and …

2024年10月24日 · HR 8799 c is a gas giant exoplanet that orbits a F-type star. Its mass is 10 Jupiters, it takes 189 years to complete one orbit of its star, and is 38 AU from its star. Its …

2011年10月6日 · This is an illustration of the HR 8799 exoplanet system based on the reanalysis of Hubble NICMOS data and ground-based observations. The positions of the star and the …

10 小时之前 · La CO 2 su Hr 8799 "Rilevando queste grandi formazioni di anidride carbonica, abbiamo dimostrato che nelle atmosfere di questi pianeti è presente una frazione …