Proposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.The physical size of the object or the apparent angle it subtends on the sky. Interstellar distances can also be measured in parsecs. Solar system are usually measured in Astronomical Units (AU). The physical distance from Earth to the astronomical object. One of 88 recognized regions of the celestial sphere in which the object appears. Right ascension – analogous to longitude – is one component of an object's position.ĭeclination – analogous to latitude – is one component of an object's position. Credits ImageĪ name or catalog number that astronomers use to identify an astronomical object. NIRCam was built by a team at the University of Arizona and Lockheed Martin’s Advanced Technology Center. Webb also captured 6 more of Neptune’s 14 known moons, along with a smattering of distant galaxies that appear as dim splotches and a nearby star. To the upper left of the planet in this image, one of Neptune’s moons, Triton, also sports Webb’s distinctive eight diffraction spikes, an artifact of the telescope’s structure. These methane-ice clouds are prominent in Webb’s image as bright streaks and spots, which reflect sunlight before it is absorbed by methane gas. Methane so strongly absorbs red and infrared light that the planet is quite dark at near-infrared wavelengths, except where high-altitude clouds are present. Methane appears blue in visible wavelengths but, as evident in Webb’s image, that’s not the case in the near-infrared. Neptune, an ice giant, has an interior that is much richer in elements heavier than hydrogen and helium, like methane, than the gas giants Jupiter and Saturn. Webb’s new image of Neptune also captures details of the planet’s turbulent, windy atmosphere. This image of the Neptune system, captured by Webb’s Near-Infrared Camera (NIRCam), reveals stunning views of the planet’s rings, which have not been seen with this clarity in more than three decades.
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