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is part of |
has acceptance statu |
is an instance of |
has frequency |
has optical brightness variation |
has observational problem |
has distance |
has acronym |
has abundance |
has orbital eccentricity |
has wavelength |
is a kind of |
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obey |
has number of star |
eclipsing binary | | | | | 0.2 magnitudes or greater | some difficulty in distinguishing between various kinds | | | half the stars in the solar neighborhood are members of star systems | | | close binary | - R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name
- RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted
- AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted
- V 335, V 336, etc., when the double letter designations are exhausted
| within a period of decades | | Eclipsing variables whose orbital plane lies so nearly in the line of sight that eclipses, as seen from the Earth, can occur and can be detected from their light curves. | | 2 |
X-ray pulsar | dark halo | hypothetical | | inversely proportional to the wavelength | | | | PSR | | | inversely proportional to its momentum | pulsar | | | hidden mass | Pulsar (q.v.) that radiates in the X-ray region of the spectrum. Best verified examples are Her X-1 and Cen X-3. They are thought to be rotating, strongly magnetic neutron stars of about 1 Msun in a grazing orbit around a more massive star from which they are accreting matter. | uncertainty principle | |
Centaurus X-3 | dark halo | hypothetical | eclipsing binary | inversely proportional to the wavelength | 0.2 magnitudes or greater | some difficulty in distinguishing between various kinds | 5-10 kpc | PSR | half the stars in the solar neighborhood are members of star systems | e < 0.002 | inversely proportional to its momentum | | - R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name
- RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted
- AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted
- V 335, V 336, etc., when the double letter designations are exhausted
| within a period of decades | Krzeminski's star | A pulsating binary X-ray source in the galactic plane. Optical component is Krzeminski's star, a B0 giant or supergiant. The X-ray component is probably a rotating neutron star of about 0.65-0.83 Msun. Cen X-3 is speeding up at a rate of about 1 part in 103-105 per year and will at this rate fall into its companion in about 1000 years. | uncertainty principle | 2 |