obscuration
21partial obscuration — A designation of the sky cover when part of the sky is hidden by surface based obscuring phenomena …
22eclipse — eclipser, n. /i klips /, n., v., eclipsed, eclipsing. n. 1. Astron. a. the obscuration of the light of the moon by the intervention of the earth between it and the sun (lunar eclipse) or the obscuration of the light of the sun by the intervention …
23IC 342/Maffei Group — Observation data (Epoch J2000) Constellation(s) Cassiopeia/Camelopardalis/Perseus …
24Smoke detector — A smoke detector is a device that detects smoke, typically as an indicator of fire. Commercial, industrial, and mass residential devices issue a signal to a fire alarm system, while household detectors, known as smoke alarms, generally issue a… …
25nebula — nebular, adj. /neb yeuh leuh/, n., pl. nebulae / lee , luy /, nebulas. 1. Astron. a. Also called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula …
26Annular eclipse — Eclipse E*clipse ([ e]*kl[i^]ps ), n. [F. [ e]clipse, L. eclipsis, fr. Gr. e kleipsis, prop., a forsaking, failing, fr. eklei pein to leave out, forsake; ek out + lei pein to leave. See {Ex }, and {Loan}.] 1. (Astron.) An interception or… …
27Cycle of eclipses — Eclipse E*clipse ([ e]*kl[i^]ps ), n. [F. [ e]clipse, L. eclipsis, fr. Gr. e kleipsis, prop., a forsaking, failing, fr. eklei pein to leave out, forsake; ek out + lei pein to leave. See {Ex }, and {Loan}.] 1. (Astron.) An interception or… …
28Eclipse — E*clipse ([ e]*kl[i^]ps ), n. [F. [ e]clipse, L. eclipsis, fr. Gr. e kleipsis, prop., a forsaking, failing, fr. eklei pein to leave out, forsake; ek out + lei pein to leave. See {Ex }, and {Loan}.] 1. (Astron.) An interception or obscuration of… …
29occultation — Eclipse E*clipse ([ e]*kl[i^]ps ), n. [F. [ e]clipse, L. eclipsis, fr. Gr. e kleipsis, prop., a forsaking, failing, fr. eklei pein to leave out, forsake; ek out + lei pein to leave. See {Ex }, and {Loan}.] 1. (Astron.) An interception or… …
30transit — Eclipse E*clipse ([ e]*kl[i^]ps ), n. [F. [ e]clipse, L. eclipsis, fr. Gr. e kleipsis, prop., a forsaking, failing, fr. eklei pein to leave out, forsake; ek out + lei pein to leave. See {Ex }, and {Loan}.] 1. (Astron.) An interception or… …
