Many decades ago, the astronomers on the staff of mount wilson and palomar observatories each received about 60 nights per year for their observing programs. today, an astronomer feels fortunate to get 10 nights per year on a large telescope. can you suggest some reasons for this change?

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explanation:

boats, things on boats luggage are way more heavy then water.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.