Lunar eclipses<span> occur in pairs with solar </span>eclipses<span>, two weeks apart. This is because the Earth, sun and moon must be aligned for an </span>eclipse<span> to occur, and the alignment can only happen twice during the moon's month-long orbit. A lunar </span>eclipse<span> lasts for hours as the moon slowly orbits through the Earth's shadow.</span>
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to provide a reference system
Explanation:
The equator and prim meridian used on maps provides a reference system for determining location and navigating the earth.
- An equator is the only line of latitude that is a great circle.
- Prime meridian is a line of longitude that is 0°
- When both are used, they can form the basis of a reference system to determine places on earth.
- Using these lines, we can assign values of coordinates to the earth surface to facilitate location determination.
The equator and prime meridian are used on maps to provide a reference system.
Answer:
On the oceans of the Earth, gravity and inertia work in opposition, causing tidal bulges on opposite sides of the planet. The moon's gravitational force pulls the ocean's waters toward it on the "near" side of the Earth (the side facing the moon), resulting in a bulge.
Explanation:
Answer:
The spectral types and sub-classes represent a temperature sequence, from hotter (O stars) to cooler (M stars), and from hotter (subclass 0) to cooler (subclass 9). The temperature defines the star's "color" and surface brightness. ... Stars are also classified by luminosity class.
Explanation:
