What causes the seasons? A. The rotation of the earth. B. The movement of the moon. C. The tilt of the earth. D. The distance between the E. arth and the sun. 相关知识点: 试题来源: 解析 C。本题考查对季节形成原因的掌握。地球的倾斜导致不同地区在不同时间接收到的太阳辐射不同,从...
Here’s how it works. See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2025. (Image credit: NASA/JPL-Caltech) Jump to: Moon phase tonight Next moon phase Moon phase calendar Phases of the moon Moon phase Q&A with an expert ...
A. The rotation of the Earth. B. The movement of the moon. C. The heat of the sun. D. The blowing of the wind. 相关知识点: 试题来源: 解析 B。潮汐是由月球的运动引起的,选项 A 地球的自转不是潮汐形成的主要原因;选项 C 太阳的热量不是潮汐的成因;选项 D 风的吹拂不会导致潮汐,所以选...
The time measured by the stars is called sidereal time. It is not the same as solar time, so scientists have to mathematically convert their measurements to arrive at UT. Sidereal time reflects the period it takes Earth to complete a full rotation around its axisin relation to a fixed objec...
The moon and Jupiter will culminate due south around 9:30 p.m. local time and set in the west before dawn on Saturday morning. By then the diurnal rotation of the sky will lift the moon above Jupiter. Saturday, Jan. 11 - Mars Closest to Earth (overnight) An illustration of the sun...
A sundial shows the true or apparent solar time. Because the Earth's rotation is not constant,solar daysvary slightly in length. This means that the speed of true solar time is not constant. Mean Solar Timeis based on the length of ameanoraveragesolar day, which is 24 hours long. It ...
Vernal does not mean new or fresh in Latin. The Latin word for new is nova and the Latin word for fresh is recentibus. Ver means Spring in Latin. According to the Oxford dictionary it evolved over time from Ver (Spring) to Vernus (of the Spring) to Vernalis to Vernal (around the ...
Many people have wondered what makes the oceans rise and fall on the world's beaches twice a day.Those tides are caused by the force of the Moon's graveity(地心引力) and the rotation(自转) of the Earth.Gravity acts on the center of any solid object.The Earth is mostly molten(熔化的...
英语翻译Many people have wondered what makes the oceans rise and fall on the world's beaches twice a day.Those tides are caused by the force of the Moon's graveity(地心引力) and the rotation(自转) of the Earth.Gravity acts on the center of
In 1967, a committee at the United Nations officially adopted UTC as a standard that's more accurate than GMT for setting clocks. UTC incorporates measurements of the Earth's rotation as well as averaged readings from around 400 atomic clocks around the world. Why is it called UTC? You migh...