| Subject | 
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 | 
has name designated with | 
has observable variation time scale | 
has synonym | 
has definition | 
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 |