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Astronomyl 207/l ASTRl 207l Midterml 1l Examl -l (Latestl 2026/l 2027l Update)l Review|l 100%l Verifiedl Questionsl &l Answersl |l Gradel A
Q:l Whichl ofl thel followingl isl thel reasonl forl thel solarl dayl beingl longerl thanl al sidereall day?
Answer:
thel combinedl effectl ofl thel rotationl ofl Earthl andl itsl orbitl aroundl thel Sun
Q:l Supposel wel lookl atl al photographl ofl manyl galaxies.l Assumingl thatl alll galaxiesl formedl atl aboutl thel samel time,l whichl galaxyl inl thel picturel isl thel youngest?
Answer:
thel onel thatl isl furthestl away
Q:l Patternsl ofl starsl inl constellationsl hardlyl changel inl appearancel overl timesl ofl evenl al fewl thousandl years.l Why?
Answer:
Thel starsl inl ourl skyl actuallyl movel rapidlyl relativel tol us-thousandsl ofl kilometersl perl hour-l butl arel sol farl awayl thatl itl takesl al longl timel forl thisl motionl tol makel al noticeablel changel inl thel patternsl inl thel sky
Q:l Onl al cosmicl calendar,l inl whichl thel historyl ofl thel universel isl compressedl intol onel year,l howl longl isl thel averagel humanl lifel span?
Answer:
0.2l second 1 / 2
Q:l Supposel youl livel atl latitudel 40l degreesl North.l Whichl ofl thel followingl describesl thel conditionsl thatl makel al starl circumpolar?
Answer:
Starsl arel circumpolarl ifl theyl havel declinationl >+50l degrees
Q:l Whatl dol wel meanl whenl wel sayl thatl thel universel isl expanding?
Answer:
Averagel distancesl arel increasingl betweenl galaxies
Q:l Whatl makesl thel Northl Star,l Polaris,l special?
Answer:
Itl appearsl veryl nearl thel northl celestiall pole
Q:l Whyl werel ancientl peoplesl unablel tol detectl stellarl parallax?
Answer:
Theyl didl notl havel thel abilityl tol measurel veryl smalll angles
Q:l Thel lunarl monthl isl longerl thanl thel sidereall monthl because
Answer:
Thel moonl hasl tol completel morel thanl onel fulll orbitl aroundl Earthl tol completel thel cyclel ofl lunarl phases
Q:l Whichl ofl thel followingl statementsl isl true?
Answer:
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