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Newsela | Ocean's riches lure deep-sea miners, but scientists urge caution

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Newsela | Soundcheck: Humans contribute to ocean noise in a dramatic way

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Newsela | Oceanography explores the seas from cresting waves to the deep

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Oceanography is the study of all aspects of the ocean. Oceanography covers a wide range of topics, from marine life and ecosystems to currents and waves, the movement of sediments, and seafloor geology.

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Newsela | Wreckage expert Robert Ballard is looking for Amelia Earhart

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Robert Ballard is looking for Amelia Earhart's plane in the Pacific.

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Oceanography is the study of all aspects of the ocean. Oceanography covers a wide range of topics, from marine life and ecosystems to currents and waves.

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Newsela | Spiny lobsters make sounds that can be heard miles away

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Scientists use hydrophones, or underwater microphones, to listen for and record underwater sounds made by spiny lobsters.

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Newsela | Titanic discoverer took marine archaeology to new depths

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New technology changes field of maritime archaeology

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Many people dismiss space exploration as a luxury, but this attitude is not only wrong, it's dangerous .

Satellite technology has revolutionized our planet in almost every way. Weather satellites help us track developing hurricanes, allowing meteorologists to warn people days in advance. That saves thousands of lives. Communication satellites allow us instant access to information all over the world using radio, television, and phones. Some people credit in part the fall of the Soviet Union to ease of information access; the people in those countries saw what the rest of the world was doing, accelerating the process of reform. GPS satellites allow us to track ships, airplanes, and even people who may be lost or in need of help.

Reaching outward into space has helped us in other ways as well. A fleet of satellites (YOHKOH, SOHO and others) study the Sun so that we can better understand it. Huge solar eruptions can damage satellites and cause power blackouts (like in Quebec in 1989), and the Sun directly influences our environment. Understanding the Sun is a critical use of space technology.

Exploring the other planets helps us put the Earth in context. Why is Mars dry, cold, nearly airless, and dead? Why is Venus covered in thick clouds and suffering a runaway greenhouse effect? Why do hurricanes on Jupiter last for centuries? All these questions (and thousands more) help us understand our own planet, and allow us to see how humans are affecting it. Certainly understanding asteroids is important-- we need to learn how to move them in case one is heading our way; an asteroid impact could wipe out all humans on Earth, so our very future is tied to space travel.

There are simple technological reasons for space exploration as well. Some estimates say that for every dollar invested in the Apollo program, more than 20 have been returned. That's a huge payoff! Computer tech, communications, rocketry, and many other fields have benefited hugely from space exploration.

And there is one more reason. Humans strive to learn, to explore, to push boundaries, to see what's around the corner. This is in many ways a fundamental need, and space exploration is a fantastic manifestation of that. The Universe is huge, beautiful, mysterious, and, ultimately, knowable . Even if the other reasons were not there, this alone should be enough for us pursue our exploration.

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Many people dismiss space exploration as a luxury, but this attitude is not only wrong, it's dangerous . Satellite technology has revolutionized our planet in almost every way. Weather satellites help us track developing hurricanes, allowing meteorologists to warn people days in advance. That saves thousands of lives.

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Neil deGrasse Tyson - We Stopped Dreaming (Episode 1)

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Help Save our Oceans! : A Groundbreaking Undersea Expedition with Fabien Cousteau

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For centuries, people dreamed about leaving Earth and travelling to other worlds. Then, in 1957, the Soviet Union made the first small step into space by launching a small satellite, called Sputnik. The Space Age had begun.

Early space activities were dominated by the United States and the Soviet Union. However, as time went by, Europe and Japan also learned how to build their own satellites and rockets. Today, countries such as China, India, South Korea, Israel and Brazil are developing their own space industries.

During the last 60 years, unmanned probes have been sent towards all of the planets in the Solar System, as well as many satellites, asteroids and comets. Spacecraft have soft-landed on half a dozen worlds, while rovers have driven over the surfaces of the Moon and Mars. The Sun has also been explored in great detail by a fleet of spacecraft.

Many space observatories, such as the Hubble Space Telescope, have been launched to look at the distant Universe. They have sent back some amazing pictures taken in visible light. But they can also observe stars and galaxies at wavelengths that are invisible to human eyes - radio, infrared, ultraviolet, X-rays and gamma rays. The flood of discoveries has changed the way we look at the Universe.

More than 500 people have also flown in space since Yuri Gagarin paved the way in 1961. 20 people have travelled to the Moon and 12 of them have walked on the Moon. Space stations have been built, and astronauts have learned to live and work in space for many months, or even years.

Last modified 26 January 2011

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For centuries, people dreamed about leaving Earth and travelling to other worlds. Then, in 1957, the Soviet Union made the first small step into space by launching a small satellite, called Sputnik. The Space Age had begun. Early space activities were dominated by the United States and the Soviet Union.

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Editor's Note: Amitai Etzioni is professor of international relations and director of the Institute for Communitarian Policy Studies at George Washington University.

Story highlights

While space travel still gets a lot of attention, not enough attention has been accorded to a major new expedition to the deepest point in the ocean, some 7 miles deep - the recent journey by James Cameron, on behalf of National Geographic.

The cover story of the prestigious journal Foreign Affairs lays out the "Case for Space." "60 Minutes" recently ran a story about the dire effects on Florida's space industry of scaling back our extraterrestrial endeavors. Newt Gingrich gained attention earlier this year by calling for building a permanent base on the moon. And President Obama has talked of preparing to eventually send Americans into orbit around Mars.

Actually, there are very good reasons to stop spending billions of dollars on manned space missions, to explore space in ways that are safer and much less costly, and to grant much higher priority to other scientific and engineering mega-projects, the oceans in particular.

The main costs of space exploration arise from the fact that we are set on sending humans, rather than robots. The reasons such efforts drive up the costs include: A human needs a return ticket, while a robot can go one way. Space vehicles for humans must be made safe, while we can risk a bunch of robots without losing sleep. Robots are much easier to feed, experience little trouble when subject to prolonged weightlessness, and are much easier to shield from radiation. And they can do most tasks humans can.

British astronomer royal Martin Rees writes, "I think that the practical case (for manned flights) gets weaker and weaker with every advance in robotics and miniaturization. It's hard to see any particular reason or purpose in going back to the moon or indeed sending people into space at all." Nobel Laureate Steven Weinberg calls manned missions "an incredible waste of money" and argues that "for the cost of putting a few people on a very limited set of locations on Mars we could have dozens of unmanned, robotic missions roving all over Mars."

The main argument for using humans is a public relations one. As Neil deGrasse Tyson puts it in Foreign Affairs, "China's latest space proclamations could conceivably produce another 'Sputnik moment' for the United States, spurring the country into action after a relatively fallow period in its space efforts." Also, astronauts are said to inspire our youth to become scientists and explorers. However, it is far from established that we cannot achieve the same effects by making other R&D projects our main priority.

Take the oceans, about which we know much less than the dark side of the moon. Ninety percent of the ocean floor has not even been charted, and while we have been to the moon, the technology to explore the ocean's floors is still being developed. For example, a permanent partially-submerged sea exploration station, called the SeaOrbiter, is currently in development.

The oceans play a major role in controlling our climate. But we have not learned yet how to use them to cool us off rather than contribute to our overheating. Ocean organisms are said to hold the promise of cures for an array of diseases. An examination of the unique eyes of skate (ray fish) led to advances in combating blindness, the horseshoe crab was crucial in developing a test for bacterial contamination, and sea urchins helped in the development of test-tube fertilization.

The toadfish's ability to regenerate its central nervous system is of much interest to neuroscientists. A recent Japanese study concluded that the drug eribulin, which was derived from sea sponges, is effective in combating breast, colon, and urinary cancer.

Given the looming crisis of water scarcity, we badly need more efficient and less costly methods to desalinate ocean water. By 2025, 1.8 billion people are expected to suffer from severe water scarcity, with that number jumping to 3.9 billion by 2050-well over a third of the entire global population.

If the oceans do not make your heart go pitter-patter, how about engineering a bacteria that eats carbon dioxide - and thus helps protect the world from overheating - AND excretes fuel which will allow us to drive our cars and machines, without oil? I cannot find any evidence that people young or old, Americans or citizens of other nations, would be less impressed or less inspired with such a breakthrough than with one more set of photos of a far away galaxy or a whole Milky Way full of stars.

Space enthusiasts claim that space exploration has generated major spinoffs for our life right here on Earth. Tyson quotes President Obama suggesting that the Apollo mission "produced technologies that have improved kidney dialysis and water purification systems; sensors to test for hazardous gases; energy-saving building materials; and fire-resistant fabrics used by firefighters and soldiers," and adds a few more innovations to the list: "digital imaging, implantable pacemakers, collision-avoidance systems on aircraft, precision LASIK eye surgery, and global positioning satellites."

Of course, the space environment is radically different from the one on Earth. Materials and technologies that are suited for a vacuum, zero gravity, and extreme cold and heat are not the ones we typically can use on Earth.

Opinion: Gingrich's moon colony lost in the laughter

Elias Carayannis, professor of Science, Technology, Innovation and Entrepreneurship at The George Washington University, notes "government agencies - particularly those such as the National Space and Aeronautics Administration that are continually pressured to justify their activities - tout the spin-off value of their investments in sometimes quite extravagant claims." Products such as Velcro, Tang, and Teflon that are often cited as spinoffs of space technology did not actually result from the space program.

Space promoters tell us, once every few months, that there are signs that there might be or has been water on one of the planets that might make "life" possible. I wonder if some of those who hear these reports interpret them to mean that we expect to find a civilization out there, one that we could ally with, say against the Chinese. What scientists are really talking about is organic material, the kind found in any compost - not a reason to spend billions of dollars of public funds.

In short, do not cry for Mars. It is not going away. We can send R2D2 to explore it and still keep a whole pile of dough for important and inspiring exploration missions right here on Earth, starting at the beach nearest you.

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Editor's Note: Amitai Etzioni is professor of international relations and director of the Institute for Communitarian Policy Studies at George Washington University. While space travel still gets a lot of attention, not enough attention has been accorded to a major new expedition to the deepest point in the ocean, some 7 miles deep - the recent journey by James Cameron, on behalf of National Geographic.

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Welcome to the 21st-century space race, one that could potentially lead to 10-minute space vacations, orbiting space hotels, and humans on Mars. Now, instead of warring superpowers battling for dominance in orbit, private companies are competing to make space travel easier and more affordable. This year, SpaceX achieved a major milestone- launching humans to the International Space Station (ISS) from the United States -but additional goalposts are on the star-studded horizon.

Private spaceflight

Private spaceflight is not a new concept. In the United States, commercial companies played a role in the aerospace industry right from the start: Since the 1960s, NASA has relied on private contractors to build spacecraft for every major human spaceflight program, starting with Project Mercury and continuing until the present.

Today, NASA's Commercial Crew Program is expanding on the agency's relationship with private companies. Through it, NASA is relying on SpaceX and Boeing to build spacecraft capable of carrying humans into orbit. Once those vehicles are built, both companies retain ownership and control of the craft, and NASA can send astronauts into space for a fraction of the cost of a seat on Russia's Soyuz spacecraft.

SpaceX, which established a new paradigm by developing reusable rockets, has been running regular cargo resupply missions to the International Space Station since 2012. And in May 2020, the company's Crew Dragon spacecraft carried NASA astronauts Doug Hurley and Bob Behnken to the ISS, becoming the first crewed mission to launch from the United States in nearly a decade. The mission, called Demo-2, is scheduled to return to Earth in August. Boeing is currently developing its Starliner spacecraft and hopes to begin carrying astronauts to the ISS in 2021.

Other companies, such as Blue Origin and Virgin Galactic, are specializing in sub-orbital space tourism. Test launch video from inside the cabin of Blue Origin's New Shepard shows off breathtaking views of our planet and a relatively calm journey for its first passenger, a test dummy cleverly dubbed "Mannequin Skywalker." Virgin Galactic is running test flights on its sub-orbital spaceplane, which will offer paying customers roughly six minutes of weightlessness during its journey through Earth's atmosphere.

With these and other spacecraft in the pipeline, countless dreams of zero-gravity somersaults could soon become a reality-at least for passengers able to pay the hefty sums for the experience.

Looking to the moon

Moon missions are essential to the exploration of more distant worlds. After a long hiatus from the lunar neighborhood, NASA is again setting its sights on Earth's nearest celestial neighbor with an ambitious plan to place a space station in lunar orbit sometime in the next decade. Sooner, though, the agency's Artemis program, a sister to the Apollo missions of the 1960s and 1970s, is aiming to put the first woman (and the next man) on the lunar surface by 2024.

Extended lunar stays build the experience and expertise needed for the long-term space missions required to visit other planets. As well, the moon may also be used as a forward base of operations from which humans learn how to replenish essential supplies, such as rocket fuel and oxygen, by creating them from local material.

Such skills are crucial for the future expansion of human presence into deeper space, which demands more independence from Earth-based resources. And although humans have visited the moon before, the cratered sphere still harbors its own scientific mysteries to be explored-including the presence and extent of water ice near the moon's south pole, which is one of the top target destinations for space exploration.

NASA is also enlisting the private sector to help it reach the moon. It has awarded three contracts to private companies working on developing human-rated lunar landers-including both Blue Origin and SpaceX. But the backbone of the Artemis program relies on a brand new, state-of-the-art spacecraft called Orion.

Currently being built and tested, Orion-like Crew Dragon and Starliner-is a space capsule similar to the spacecraft of the Mercury, Gemini, and Apollo programs, as well as Russia's Soyuz spacecraft. But the Orion capsule is larger and can accommodate a four-person crew. And even though it has a somewhat retro design, the capsule concept is considered to be safer and more reliable than NASA's space shuttle-a revolutionary vehicle for its time, but one that couldn't fly beyond Earth's orbit and suffered catastrophic failures.

Capsules, on the other hand, offer launch-abort capabilities that can protect astronauts in case of a rocket malfunction. And, their weight and design mean they can also travel beyond Earth's immediate neighborhood, potentially ferrying humans to the moon, Mars, and beyond.

A new era in spaceflight

By moving into orbit with its Commercial Crew Program and partnering with private companies to reach the lunar surface, NASA hopes to change the economics of spaceflight by increasing competition and driving down costs. If space travel truly does become cheaper and more accessible, it's possible that private citizens will routinely visit space and gaze upon our blue, watery home world-either from space capsules, space stations, or even space hotels like the inflatable habitats Bigelow Aerospace intends to build.

The United States isn't the only country with its eyes on the sky. Russia regularly launches humans to the International Space Station aboard its Soyuz spacecraft. China is planning a large, multi-module space station capable of housing three taikonauts, and has already launched two orbiting test vehicles-Tiangong-1 and Tiangong-2, both of which safely burned up in the Earth's atmosphere after several years in space.

Now, more than a dozen countries have the ability to launch rockets into Earth orbit. A half-dozen space agencies have designed spacecraft that shed the shackles of Earth's gravity and traveled to the moon or Mars. And if all goes well, the United Arab Emirates will join that list in the summer of 2020 when its Hope spacecraft heads to the red planet. While there are no plans yet to send humans to Mars, these missions-and the discoveries that will come out of them-may help pave the way.

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The future of spaceflight-from orbital vacations to humans on Mars

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Welcome to the 21st-century space race, one that could potentially lead to 10-minute space vacations, orbiting space hotels, and humans on Mars. Now, instead of warring superpowers battling for dominance in orbit, private companies are competing to make space travel easier and more affordable.

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Apollo was the NASA program that resulted in American astronauts' making a total of 11 spaceflights and walking on the moon.