16The first artificial satellite was:AExplorer 1BAryabhataCVostok 1DSputnik 1View AnswerDiscussWorkspaceReportSaveEasy
17The nearest star to Earth after the Sun is:AProxima CentauriBBetelgeuseCPolarisDSiriusView AnswerDiscussWorkspaceReportSaveEasy
18The hottest planet in the Solar System is:AVenusBJupiterCMercuryDMarsView AnswerDiscussWorkspaceReportSaveEasy
19Which planet rotates on its side, with an axis tilt of about 98°?AUranusBNeptuneCVenusDSaturnView AnswerDiscussWorkspaceReportSaveEasy
20Which is the largest planet in the Solar System?AJupiterBSaturnCEarthDNeptuneView AnswerDiscussWorkspaceReportSaveEasy