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from article Pulsar
An artist's impression of a pulsar, with depicted radiation beams and magnetic field lines. (Credit: NASA)
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Image
from article Pulsar
Chart recording of radio emission from the pulsar PSR B0329+54, observed at a frequency of 400 MHz. This pulsar lies at a distance of about 3457 light-years (3.3 × 1016 km or 2.0 × 1016 mi) from Earth.
Image
from article Pulsar
Average pulse shapes of six pulsars. The data plotted cover a small, roughly 10% fraction of one rotation period. (a) PSR B0329+54. (b) PSR B0950+08. (c) PSR B1237+25. (d) PSR B1508+55. (e) PSR B1642-03. (f) PSR B1919+21.
Image
from article Pulsar
Individual pulses from pulsar PSR B1133+16, illustrating the variations that take place within pulses and from one pulse to the next.
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from article Pulsar
Distribution of pulsars in galactic coordinates, showing all pulsars known in late 2010. (Credit: Duncan R. Lorimer)
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from article Pulsar
An artist's impression of a binary pulsar, with a pulsar (right) drawing material off a red dwarf companion star (left), gravitationally distorting the latter's shape. (Credit: NASA)
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from article Carbon-nitrogen-oxygen cycles (astrophysics)
Carbon-nitrogen-oxygen cycles. (After J. Audouze, ed., CNO Isotopes in Astrophysics, D. Reidel, 1977)
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from article Carbon-nitrogen-oxygen cycles (astrophysics)
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from article Carbon-nitrogen-oxygen cycles (astrophysics)
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from article Far Ultraviolet Spectroscopic Explorer (FUSE) mission
An artist’s impression of the Far Ultraviolet Spectroscopic Explorer (FUSE) spacecraft. (Credit: Johns Hopkins University Applied Physics Laboratory)
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from article Far Ultraviolet Spectroscopic Explorer (FUSE) mission
The FUSE instrument. It has two nearly identical halves, one of which is shown. One mirror is coated with silicon carbide (SiC) and the other with aluminum (Al) and lithium fluoride (LiF). The fine-error charge-coupled-device (CCD) sensor views…
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from article Far Ultraviolet Spectroscopic Explorer (FUSE) mission
An artist's impression of the disk around the star Beta Pictoris, based in part on FUSE observations. Comets move through the system and planets might be forming or already have formed. The inset depicts two potential terrestrial planet types, with…
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from article Hertzsprung-Russell diagram
Classic Hertzsprung-Russell diagram with absolute visual magnitude plotted against spectral class. The heavy lines show the average locations of the various MK classes, Ia-0 (bright supergiants) through V (main sequence dwarfs). At the lower left…
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from article Hertzsprung-Russell diagram
Color-magnitude diagram of 15,000 stars within 100 parsecs, using magnitudes and distances from the Hipparcos satellite, with absolute visual magnitude on the left-hand axis and B − V color index on the lower axis. Main sequence temperatures and…
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from article Hertzsprung-Russell diagram
Color-magnitude diagram of the globular cluster Messier 5, with apparent visual magnitude (V) plotted against color index (B − V). The low metal content of the cluster, less than 1% of the solar content, causes the giants to spread out to the left…
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from article Ultraviolet astronomy
The Swift satellite’s view of the Andromeda Galaxy in ultraviolet light. Prominent in this light are energetic, hot, young stars in newly formed star clusters throughout the galaxy’s spiral arms. [Credit: NASA/Swift/Stefan Immler (GSFC) and Erin…
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from article Ultraviolet astronomy
An artist’s impression of the GALEX spacecraft. (Credit: NASA/JPL-Caltech)
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from article Ultraviolet astronomy
Ultraviolet image from GALEX showing the galaxy M83, located 15 million light-years away. Ultraviolet light traces young populations of stars. In this image, young stars can be seen far beyond the main spiral disk of M83, up to 140,000 light-years…
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from article Solar constant
Composite time series of daily values of the solar constant as obtained from radiometers in space, adjusted to the improved minimum level reported in 2011. The “dips” due to sunspots produce the minimum points. (Physikalisch-Meteorologisches…
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from article Spectroheliograph
Optical configuration of a simple spectroheliograph.
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from article Enceladus
Mosaic of 21 narrow-angle camera images (taken using visible, infrared, and ultraviolet filters) of Enceladus, taken by the Cassini orbiter on July 14, 2005. The Southern Hemisphere region is smoother and younger, in contrast to the older, cratered…
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from article Enceladus
Different views of the Enceladus plumes. (a) Image of back-lit (by the Sun) Enceladus, revealing the large scale of the plumes. (b) Imagery revealing eight different sources associated with the tiger-stripe features. (c) At least 30 differently…
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from article Enceladus
Back-lit view of Saturn's E ring from September 15, 2006, showing wisps of bright, icy material from Enceladus joining the E ring. The structure of the wisps contains information about the direction of grain emission, the sweeping aspect of…
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from article Enceladus
Model to explain the observation of plumes above the Enceladus tiger stripe fissures, and of sodium salts and organics in the plumes. Slightly bubbly seawater from a subsurface ocean travels through a passage in the ice crust to feed a geyser,…
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from article Syzygy
Diagram, not to scale, of the Sun, the Earth, the Moon, and a planet, illustrating syzygy. Symbols are explained in text.
