單項選擇題Planetary aberration is due,in part,to().

A.refraction of light as it enters the Earth's atmosphere
B.rotation of the Earth on it's axis
C.the body's orbital motion during the time required for its light to reach Earth
D.a false horizon


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題Perihelion is the point where the Sun().

A.is nearest to the Earth
B.is farthest from the Earth
C.is on the opposite side of the Earth from the Moon
D.and Moon and Earth are in line

2.單項選擇題Other than the Sun and Moon,the brightest object in the sky is().

A.Sirius
B.Canopus
C.Venus
D.Jupiter

3.單項選擇題Opposition occurs when().

A.the Sun,Earth,and Moon are at right angles
B.the Sun's declination is 0°and is moving south
C.an inferior planet is at the maximum angle to the line of sight to the Sun
D.the Earth is between a planet and the Sun

4.單項選擇題On mid-ocean waters,the height of a wind-generated wave is not affected by the().

A.water depth exceeding 100 feet
B.fetch
C.wind's velocity
D.duration of the wind

5.單項選擇題Mars will not be visible().

A.at elongation angles near 180°
B.from quadrature to opposition
C.at conjunction
D.at opposition

最新試題

觀測天體高度前的準備工作包括()①預求觀測時間②檢查秒表狀態(tài),使表時歸零③推算測天時的天文鐘鐘差④提前將六分儀拿到室外,適應環(huán)境溫度⑤檢查校正六分儀誤差,調(diào)整好望遠鏡焦距

題型:單項選擇題

平放六分儀,刻度弧朝外將指標桿移至(),眼睛置于動鏡后檢查六分儀的動鏡差。

題型:單項選擇題

下列天體觀測高度的幾個訂正值中恒為“+”的是()①眼高差②視差③蒙氣差④半徑差

題型:單項選擇題

測定羅經(jīng)差精度較高的方法是()

題型:單項選擇題

六分儀觀測天體高度的要領(lǐng)是,大擺(),小擺(),微擺()。

題型:單項選擇題

航用海圖上繪畫天文船位線,當天體真高度大于天體計算高度時,應()截取高度差。

題型:單項選擇題

在六分儀上直接讀取太陽的下邊緣觀測高度,并利用中版《航海天文歷》求太陽的真高度,則需要修正哪些誤差?()①器差②指標差③眼高差④綜合改正⑤附加改正

題型:單項選擇題

使用英版《航海天文歷》高度修正表求取行星真高度時,總改正的查表引數(shù)是()

題型:單項選擇題

英版海圖上回轉(zhuǎn)流表列潮流在某個方向上有兩個速度,表示()

題型:單項選擇題

根據(jù)《航海天文歷》查取天體位置的查表引數(shù)是()

題型:單項選擇題