It's typical for planets... like Mercury, Venus, Mars and Jupiter... to have a period during their orbit... in which they are obscured by the sun... and no long observable from Earth.
Ohikoa da... Merkurio, Venus, Martitz eta Jupiter planetatan... beren orbitaren zati batean zehar... Eguzkiagaitik ilunduta ikustea... eta ez izatea ikusgarriak Lurretik.