greenwich sidereal time sentence in Hindi

Examples

1. Local sidereal time at any locality differs from the Greenwich sidereal time value of the same moment, by an amount that is proportional to the longitude of the locality.
2. Then get the hour angle based on RA and local sidereal time ( or RA, observer's longitude, and Greenwich sidereal time ), and use the relations you've found to convert HA & dec to altitude and azimuth.