Does anyone believe in extraterrestrial life? If yes, why? If no, why not?

Pretty much all of science and scientists in the world believe in extraterrestrial life, even though no evidence of extraterrestrial life has ever been found to date. Why do scientists believe in extraterrestrial life? Simply because there are billions of stars in the Milky Way galaxy and billions of galaxies in the universe. Somewhere it is highly likely that extraterrestrial life exists. It is even possible that extraterrestrial life of some form or another exists on Titan, within our own solar system!

Captain Kirk (William Shatner) Sends Message to Voyager I

Of the two Voyagers, Voyager I is the farthest away at over 13 billion miles. It is outside the solar system and now in Interstellar space. In this video, we see William Shatner at NASA, read a 60 character message to Voyager, which is then sent out. It takes over 19 hours for this signal to reach Voyager I.
Here is the video:
[youtube https://www.youtube.com/watch?v=5VzVyYbPbJY]

Why would anyone want to live on Mars?

Although, scientifically, we could do as much or more with our rovers, robots and probes than manned space travel, and we can and do it cheaper and safer than manned space travel with our probes and rovers, people will still go to Mars.

Why? Well, I suppose it’s the same reason people went to North America or climb Mount Everest. Because it’s there.

Why has NASA never launched another mission to the moon?

NASA and other space agencies have launched missions to the moon, just not with astronauts. For example, the Japanese space agency once launched a satellite to completely map the surface of the moon in high definition detail.
The main reason (not sure why you don’t know this) we stopped sending men to the moon was that the Vietnam war was getting expensive and politicians decided to cut the space budget because we needed money.
Seems now like NASA is revising it’s scheme to return to the Moon within a few years time. Surely you’ve been following the news.

Moon Base coming soon?

Space tourism may only be a year away. Tickets for human flights into lower earth orbit have already sold for $250,000 each.

OPINION EDITORIAL
Friday, May 25, 2018
The first man on the moon held an American flag. In the not-too-distant future, astronauts on the moon may be holding fuel pumps.
The future for American commercial space activity is bright. Space entrepreneurs are already planning travel to Mars, and they are looking to the moon as the perfect location for a way station to refuel and restock Mars-bound rockets. As much as this sounds like the plot of “2001: A Space Odyssey,” it is coming closer to reality sooner than you may have ever thought possible.
A privately funded American space industry is the reason. This industry is making progress in leaps and bounds. The global space economy is approaching $350 billion and is expected to become a multitrillion-dollar industry. There are more than 800 operational American satellites in orbit, and by 2024 that number could exceed 15,000. Thanks to public-private partnerships, for the first time in seven years American rockets will soon carry NASA astronauts into space. Long dormant, Cape Canaveral is now bustling with activity. America is leading in space once again.
Space tourism may only be a year away. Tickets for human flights into lower earth orbit have already sold for $250,000 each. Earth-based mining companies may soon face stiff competition from the mining of gold, silver, platinum and rare earths on asteroids and even other planets. A race is already developing to create the technology that will bring those crucial resources back to earth.
Competition is already fierce, with Russia and China challenging the United States for leadership, and about 70 other countries working their way into space. But today’s space race is different. It is driven by innovative companies that are finding new solutions to get to space faster, cheaper and more effectively.
As these companies advance new ideas for space commerce and nontraditional approaches to space travel, they seek the legitimacy and stability that comes with government support and approval. They yearn for a government that acts as a facilitator, not just a regulator. Government must create frameworks that enable, rather than stifle, industry.
Unfortunately, our system for regulating private space exploration and commerce has not kept up with this rapidly changing industry. For example, when it comes to licensing cameras in space, we review small, high school science-project satellites the same as billion-dollar national defense assets, leaving too little time and too few resources for crucial national security needs.
On Thursday, President Trump signed Space Policy Directive 2, which will make important strides toward modernizing our outdated space policies. These changes include creating a new office, the Space Policy Advancing Commercial Enterprise Administration, within my office to oversee coordination of the department’s commercial space activities, establishing a “one-stop shop” to work on behalf of the budding private space sector.
This will be a major change. At my department alone, there are six bureaus involved in the space industry. A unified departmental office for business needs will enable better coordination of space-related activities. To this end, I have directed all Commerce Department bureaus with space responsibilities to assign a liaison to the new Space Administration team, including the International Trade Administration, Bureau of Industry and Security, National Telecommunications and Information Administration and National Oceanic and Atmospheric Administration.
When companies seek guidance on launching satellites, the Space Administration will be able to address an array of space activities, including remote sensing, economic development, data-purchase policies, GPS, spectrum policy, trade promotion, standards and technology and space-traffic management. The new office will also enable the department to manage its growing responsibilities in space.
The department will take on a greater role when it comes to regulation and promotion of space activity. But as the agency charged with promoting job creation and economic growth, we will not engage only in oversight, but will support American companies so they can compete and lead on a level playing field.
Collectively, these efforts will unshackle American industry and ensure American leadership in space. This is essential to technological innovation, economic growth, jobs and national security. But, perhaps more important, it is rejuvenating the American passion for space exploration.
I can still remember when President John F. Kennedy declared that America would put a man on the moon and when Neil Armstrong took that first step on the lunar landscape. Glued to televisions, Americans were filled with excitement and national pride during the Apollo missions.
Last month I felt that same passion as I visited the Space Symposium in Colorado Springs with Vice President Mike Pence. “As we push human exploration deeper into space, we will unleash the boundless potential of America’s pioneering commercial space companies,” the vice president told the crowd.
This is a very special time in space history — there is a convergence of technology, capital, and political will. The United States must seize this moment.

What's the use of the universe if Earth is the only habitable planet?

First, we don’t know Earth is the only habitable planet. However, until we have some proof, we have no way of knowing for sure. That’s why we’re searching so hard for extraterrestrial organisms.
Second, who says the universe has to have a use? It just is. Similarly, you could say what’s the use of living if you die in the end. That kind of view doesn’t do anyone any good. Just go with it and enjoy the exploration and discovery life offers us, like whether or not life exists elsewhere in the Universe.

Why do you want to go to Mars?

I don’t want to move to Mars. It’s a very dangerous environment, you’d be indoors all the time or else wearing a spacesuit for short adventures outdoors. I don’t even think it’s advantageous for humans to go to Mars at all when we could just as well, and for much less expense, send our probes and robot rovers there instead. There is no good scientific reason to go to Mars.
People will go, however, because not everyone is scientifically minded.

Using our current technology, how close to us would an alien spacecraft have to be before it could detect Life on Earth?

During Earth’s night you can see the lights of major cities from the moon. So this would imply that further out from the moon one could detect light. Then there are the radio and television waves. They go out infinitely into space, but they become four times weaker every time the distance doubles. In any case, we pick up radio signals from Voyager I and II even though they have left the solar system, so I would suppose people could pick up our radio signals quite far away.