Why do scientists think there might be life on earth like planets when aliens might survive hot temperatures with no water?

Good point. Great question. We just look for the most “likely” places life might develop. Interestingly, though, there are lifeforms like the ones you describe here on Planet Earth!

You can find these lifeforms in Chile, specifically the Atacama desert. This place is burning hot and has had no significant rainfall in at least 250 years.

According to express.co.uk “While in the central valleys [of the Atacama desert], researchers found 70 species of microorganisms and further inland, the team made another shocking discovery.” What they found, 1 meter deep, was actual living bacteria.

Life does exist in extreme conditions sometimes on Earth. Why not elsewhere, like Mars for instance?

So far, however, we haven’t found any life or former evidence of life, anywhere except here on Earth.

It leads us to believe that if life is out there somewhere, the most likely place to find it would be in conditions that are similar to various climates and places on Earth.

Is it possible for a planet, such as Mars, to develop a liveable atmosphere on its own? What would it take?

How would we know if there’s intelligent life on the planet?

 This answer is re-quoted with my permission (from my own website). Take it as a rather interesting answer to your interesting question!

Breaking news. Astrophysicists have discovered a new planet within the “Goldilocks” region orbiting a yellow dwarf star and believe it is teaming with life, thus putting to rest the age-old question: “Is there life on other planets?”

The planet appears to be similar to our own in size and has an atmosphere primarily of oxygen and nitrogen. However, don’t plan on visiting the new world anytime soon. Not only is it many light years away, but microbial life floating in the wind would be a death trap without a spacesuit since we have never developed evolutionary immunity against them.

Observations suggest the surface of the planet is mostly submerged under salt-water oceans which themselves are full of aquatic life of all sizes. The areas that rise above the oceans, approximately 25% of the planet surface, are covered with plant life which provide food for many of the animals that live there.

Evidence indicates the dry land areas are inhabited mainly by germs and insects, however quadrupeds and bipeds live among them. The bipeds appear to be polluting their own air and water due to advanced industrial revolution. Great cities have arisen all over the land and the bipeds appear to have launched satellites and probes into space. Unfortunately, they quarrel and kill each other and share no common interests with their environment.

The planet is located inside the neighboring Milky Way Galaxy, which can be seen from our own Andromeda Galaxy with the naked eye in the night sky, and appears brilliant when seen through even modest telescopes.

Tentatively the planet, has been named “Earth” and due to the circumstances may be barren of all life within a few thousand years. It has been classified as dangerous for habitation and the search for intelligent life on other worlds continues.

If two ships are travelling side be side at some major fraction of the speed of light (e.g. 90%) and are, say, 100 yards apart, would they be able to see each other out the portholes?

Great question, and you see, that’s what we mean when we say everything is relative. Your “speed” is always relative to something else. If you don’t compare it to something else, you might as well be standing still.

Relative to you, the other spaceship is standing still. You are both just floating there while Earth quickly moves away from you.

If you were going 90% the speed of light relative to your launching site on Earth, then if you looked back at Earth through a telescope you’d see them all aging very quickly, but to you and your neighboring spaceship, you’d both not experience any personal change. You’d be able to see the other ship and vice versa quite normally.

In fact, if you took a flashlight and pointed it straight ahead in the direction of your travel, even though you were going 90% the speed of light relative to Earth, the beam of light would leave your flashlight at the speed of light relative to you. That’s only possible because time has slowed down for you, making light always look like it’s going light speed. You will not notice any change personally.

On Earth, people looking at you in a telescope would see you were moving and aging very slowly, and although the light of your flashlight would not appear to be going much faster than your spaceship, because your time has slowed down, you see it going out at the speed of light and people on Earth are moving slowly.

Consider this. Here you stand or sit. But the earth is spinning at about 1000 mph at the equator. We are also going around the sun at about 67,000 mph and orbiting the galactic center of the Milky Way galaxy at about 514,000 mph, and our galaxy is approaching the Andromeda Galaxy at about 250,000 mph. So you are not standing or sitting still at all! You are moving very fast right now, but when you shine a flashlight in all directions the beam leaves your flashlight at the speed of light relative to you and your sense of time.

The same happens to you and your friend in the nearby spaceship. You can look out the porthole, see him, and wave and he can see you and wave back as if both your ships were stationary in space and just floating next to each other. It’s all relative.

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

Good News Bad News

All news is bad news. Bad news sells.

Increasingly, however, there are human interest stories dubbed “happy news” at the end of news broadcasts, but it seems to diminish in the light of the chaos that I see going on the world.

Cyber attacks, White House in turmoil, Trump increasingly isolated, Russia buzzing our planes within 20 feet, North Korea, the terrorists in Syria and Afghanistan, firing the one guy in charge of investigating the President.

Even if you get all your news from Fox and Rush Limbaugh, surely you must sense there is chaos. Every other major news organization in the world is reporting on it.

It’s depressing. I’m really trying to understand.

I’d like this blog to steer towards science, but sometimes, I just have to say something.

So here it is: something.

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.