Near-Earth Asteroid Flyby

Asteroid 2017 FE1 was first observed by Mt. Lemmon Survey on 2017-03-18

It will fly by Earth harmlessly on 2017-06-16 at 22:16 UTC at 39.9 times the distance to the Moon, at a speed (relative to the Earth) of 10.6 km/s.

It is estimated to be 164 – 518 meters in size.
#space#science#Astronomy#astrophysics#asteroids#NEO near Earth objects#physics

Why do aliens always have to look and have similar biology to us?

Exactly! To date, no life has been found on any other planet or meteor. We would really like to find life elsewhere, and the most likely candidates within reach would be the moons of Jupiter and Saturn.

Beyond that you have to go interstellar. Since it would take hundreds or even thousands of years to reach even the nearest stars at the fastest speed we’ve ever achieved in space, interstellar travel is unlikely now or in the future.

Put away Star Trek and Star Wars. Aliens are not visiting us and we are not going to visit them, whatever they may look like.

Have the space missions carried out to date ended up as well as possible, and, for that reason, there haven’t fortunately been any fatalities in space?

The Moon is not as Close as you Think!

Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune could all fit in the gap between the Earth and our Moon with about 4,990 miles to spare

Think of Earth as a basketball and the moon like a tennis ball. How far would you have to place them apart to approximate the distance between the Earth and Moon? Five feet? Ten feet? Twenty feet? Nope! Further even then that! A tennis ball would then have to be about 24 feet from the basketball to be of the proper scale. Farther than most people visualize.

This is how it looks (See image). Kind of surprising. The moon looks bigger to us than that, doesn’t it? Well, no it doesn’t. Our minds eye just makes it look bigger. Hold your thumb out at arms length. The tip of your thumb at that distance more than covers the moon. Still, the moon is the biggest thing in the night sky, and it really stands out much brighter and bigger than all the stars, relatively.

Surprisingly, people really do think the Moon is closer to the Earth than it is. You can see from the photo taking a “mere trip to the Moon” is no easy task!

Here’s a statistic for you! Think how big Jupiter, Saturn, Uranus and Neptune, the gas giants, are in relationship to our tiny Earth.

Yet our Moon is so far from Earth that Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune could all fit in the gap with about 4,990 miles to spare (using the average Earth-moon distance of 238,555 miles).

Solar_System_3

How Big does a Moon Have to Be?

Not very big! It would just have to be natural. Not made by man! And it wouldn’t have to be there for very long either. Just long enough for it to be in orbit.

The astronomical community doesn’t have a definition for moon other than it has to be a natural object. Thus captured asteroids can be moons. It’s even possible for a moon to have a moon!

Mars has two moons, neither of which are large enough to be round. Objects in space get round due to their own gravity. The first image above is Deimos and the second is Phobos, the Martian Moons. Deimos (top) is the smallest. It has a mean radius of 3.9 miles.

No Proof Life Exists Elsewhere

I know. It’s old news already. Everybody knows. Here’s the new take on it. Follow along.

Imagine we want to go to some place that might have life. We don’t know if there’s life or not, but we want to go and find out.

To quote the NASA website, designed to generate funding for NASA so that Trump won’t cut it out of existence, it says: (This is where the old news already follow along part comes in.)

NASA’s Spitzer Space Telescope has revealed the first known system of seven Earth-size planets around a single star. Three of these planets are firmly located in the habitable zone, the area around the parent star where a rocky planet is most likely to have liquid water.

The discovery sets a new record for greatest number of habitable-zone planets found around a single star outside our solar system. All of these seven planets could have liquid water – key to life as we know it – under the right atmospheric conditions, but the chances are highest with the three in the habitable zone.

“This discovery could be a significant piece in the puzzle of finding habitable environments, places that are conducive to life,” said Thomas Zurbuchen, associate administrator of the agency’s Science Mission Directorate in Washington. “Answering the question ‘are we alone’ is a top science priority and finding so many planets like these for the first time in the habitable zone is a remarkable step forward toward that goal.”

Bla bla bla. To date, no extraterrestrial microbe has ever been found — not even in our own solar system. We have not even found a fossil of a microbe. We have no idea whether life exists on any other planet in the universe other than here.

We want to find life. It will finally prove life evolves. No need for God!

It hasn’t happened yet.

Is it possible life exists elsewhere? Yes.

No proof of that above statement exists.

GIven so, are we being visited by aliens and is the bungling government covering it up? No.

Anyway, how do we go and find out? That’s 40 light years away. It would take the fastest spaceship 700,000 years to get there.

We’d need a generational spaceship. You and your mates blast off. You live your life on the spaceship. You have kids. You die. They have kids, they die. For many generations. Finally you arrive. Just like Earth traveling through space.

Well, guess what? We are already on a generational spaceship. It’s called Earth. It’s traveling through space. Generations come and go. Sometime in the future we may or may not see if there’s life out there other than us. No need to build a spaceship.

Would there be a big advantage putting a SETI listening post on the far side of the moon?

I assume the moon would act as a large shield to diminish the radio “noise” from Earth. Obviously there would be an issue getting any information back home for the same reason.

Definitely. I once spoke to an astronomer about this. It would be a huge advantage for us to have that. The problem is building it. Just imagine. The moon is a long way away and it’s a vacuum. All that heavy equipment would have to be transported in hundreds of trips and dropped off, then assembled by … whom? Robots? People? It would be great to have it but unlikely to be built.