Will the moon be closer to Earth one day and will it make ocean tides more severe?

No. The moon is drifting away about 4 centimeters a year. Over time it will drift out to space and Earth will have no moon.

Of course, the sun might become a red giant before that, killing everything, but the answer to your question is no.

As a result the tides will become less severe.

However, as the climate warms and the ocean rises as much as it is now, cities and communities near the sea will become flooded. This has nothing to do with the moon.

What planets are bigger than Earth?

The four gas giants are larger than Earth: Jupiter, Saturn, Uranus and Neptune.

Venus is slightly smaller, but very nearly the same size as Earth. Mercury and Mars are smaller than Earth.

So there are 4 planets larger than Earth in our solar system, and they are the four gas giants.solar_system_3

Meet ‘Steve,’ a Totally New Kind of Aurora

Canadian citizen scientist photographers spotted a fleeting type of aurora not seen before, dubbed “Steve,” and scientists have started working out what’s causing them.

Steve seen with the Milky Way over Childs Lake, Manitoba.

While the northern and southern lights have dazzled watchers of the night sky for millennia, vigilant citizen scientist photographers found another type of aurora over the past few years: a short-lived shimmering purple ribbon of plasma. Their intriguing discovery drew the attention of space scientists, who have just begun to study them.

“Dedicated aurora chasers, especially from Alberta, Canada, were out in the middle of the night, looking north and taking beautiful photos. Then farther south they happened to see a faint narrow purple arc as well,” says Elizabeth MacDonald, a space physicist at NASA Goddard Space Flight Center in Greenbelt, Maryland. There’s different physics behind those purple aurora, she says.

MacDonald led a team who observed the aurora by sending one of the European Space Agency’s Swarm satellites through it. The results suggest they’re a manifestation of accelerated and heated charged particles coming from the sunthat interact with a particular part of the Earth’s magnetic field in the ionosphere. The team published their findings in Science Advances Wednesday.

The citizen scientists weren’t sure about what they’d seen, so they called the strange aurora structure “Steve.” The name caught on, and MacDonald and her team kept it, proposing the backronym Strong Thermal Emission Velocity Enhancement (STEVE). While scientists had known about lower-latitude currents of charged particles for decades, they had no idea that they could produce auroras visible to the eye. But now that people have smartphones and digital cameras more sensitive than what scientists had back then, they can pick out these rare aurora, which last only about an hour.

Why do you believe we live on an oblate spheroid rotating over 1,000 mph that is spinning around the sun over 514,000 mph?

Earth is not a Harlem Globetrotter basketball spinning around on a finger.

The simple answer to your question why I believe is because this is what all the evidence has shown.

The word you use – spinning – is designed to indicate the earth is like a spinning top whizzing around and around at high speed. This is not true of Earth. Earth is rotating very slowly. Imagine a soccer ball on a table that turns around once every 24 hours. You could stare at it for a long time and not notice it move. The earth rotates half the speed of the hour hand on a clock. Can you see a clock’s hour hand move? It’s moving twice as fast as the earth is rotating.

So no. The earth is not spinning. It’s rotating very slowly. So slowly that there’s only a barely measurable difference in your weight at the equator than at the poles.

When we say it “spins” at just over 1000 mph at the equator it misleads some people to think that is so fast that things should go flying off into space. Think of it in terms of revolutions per minute (rpm).

Circular saw blades have an rpm of 3,000 to 50,000. Things fly off them. Cars sometimes have RPM gauges that measure RPM in the thousands. In the image below, this car redlines when the engine has an RPM of 7,000.

The rpm of Earth is 0.000694 RPM or about about 1/2 of one thousandths of an RPM.

Things don’t fly off something going just over 1/2 of one thousandths of an RPM. On the gauge below that would register as zero.

How long before the expansion of the Universe causes our Earth to drift away from the Sun?

How obvious are the signs of intelligence on Earth from space?

The lights, the satellites, the radio waves.

When the earth is on the dark side, it’s all about lights from cities.

Occasionally, and I mean not very often, a satellite might go by, but the radio waves will reach space.

So mainly it’s the night lights and the sound.