SCIENCE (Theory) Std – VIII 1
By Ms. Marilyn Rebello. St. Xavier's Boys' Academy.
SIRIUS The brightest star visible to us. THE DOG STAR By Ms. Marilyn Rebello. St. Xavier's Boys' Academy.
Orion The Hunter By Ms. Marilyn Rebello. St. Xavier's Boys' Academy.
Points to remember The moon takes 27.3 days to complete 1 revolution around the earth AND also make 1 rotation around itself But the moon takes 29.5 days to go from one New Moon phases to the next. Waxing moon= moon grows brighter Waning moon= moon grows dimmer Rotation- spinning of a planet about its internal axis Constellation=group of stars. The sky is divided into 88 parts identified by 88 constellations one in each part. Northern Hemisphere-37 constellations Southern Hemisphere-51 constellations By Ms. Marilyn Rebello. St. Xavier's Boys' Academy.