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He saw an emission line at a place that no one had seen before.
The number of stars with emission lines is quite low, so these were clearly unusual objects.
It is unusual because of its strong silicon emission lines.
Emission lines usually indicate that a star is surrounded by gas.
During an eclipse, emission lines can be seen in the spectrum of this system.
This material adds emission lines to the spectrum of the star.
The velocity difference between the two emission line systems is 2650 km/s.
Due to their strong emission lines they can be identified in nearby galaxies.
The star has unusual emission lines in the infrared spectrum.
We can detect hydrogen's emission lines in all parts of the Universe, and they are by far most common.
At this point the characteristic atomic emission lines of the elements can be observed.
In the latter case, emission lines may become visible when the variable component is at a low level.
Most of these have emission lines and are interesting because of their energetic activity.
Those emission lines are produced by different astrophysical objects and processes.
Its characteristic emission lines are produced by gas moving at high speeds around the central black hole.
"It seems it would be better for air quality to keep trucks moving along, rather than waiting on an emissions line," he said.
The name comes from thallium's bright green spectral emission lines.
And a letter "e" was appended if emission lines were apparent.
This produces "emission lines" in the spectrum of each atom.
It also faces the problem that for extended sources, nearby emission lines will overlap.
All elements have emission lines within this wavelength range.
If one measures the light emitted in an emission line, a K-correction is not required.
Hydrogen and calcium emission lines are observed in their spectra.
Water vapor, when present, may also play a role; its presence is characterized by the hydrogen emission lines.
The splitting of some emission lines due to the Stark effect can be used to determine the local electric field.
Wörterbuch für Astronomie