What would it be like to travel across the
solar system
and explore space?
Hi, I'm
Mike Shara
, an astrophysicist at the American Museum of Natural History.
Let's take a look at some of the places that humans might go someday, and the questions that scientists are asking.
Hi, I'm
Mike Shara
, an astrophysicist at the American Museum of Natural History.
Let's take a look at some of the places that humans might go someday, and the questions that scientists are asking.
-
Our closest neighbor is the
Moon
. Did you know that only 12 people have ever set foot on its near-black, powdery surface?
-
No one has been to the Moon since 1972. But today, many scientists want to send people and robots back there. What do you think it would be like to live and work on the Moon?
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When and if humans return to the Moon, they might want to set up a base camp. Astronauts could eat, sleep, bathe, and work in an expandable spacecraft like this one.
-
The Moon would be a great place to do astronomy. There is no atmosphere to block the view! Scientists can set up a
liquid mirror telescope
that could detect
light
from the earliest days of the
universe
.
-
Scientists are also working on an idea of a lunar elevator. Secured to a cable from a space station to the Moon, it would help transport goods and people between
Earth
and the Moon.
-
Orbiting beyond the Moon is an
asteroid
named Itokawa. This space rock is huge. It's longer than 50 school buses! Itokawa is one of more than 7,000 near-Earth asteroids in our
solar system
.
-
Can humans visit these space rocks? It's definitely a possibility. Learning more about asteroids could help scientists learn to deflect ones that get too close to Earth.
-
Next stop:
Mars
. Today, this red planet is cold and dry. But millions of tons of liquid
water
once flowed on its surface. Could life have thrived there? Scientists want to find out.
-
NASA
sent the
Curiosity
rover to Mars. This robot is like a roving science lab. It can pick up samples and test them onboard. And it can fire a laser at rocks to see what they're made of!
-
Someday, humans might go to Mars too. The Nautilus-X spacecraft could carry a crew of nine on a two-year voyage, which is long enough to reach Mars.
-
Astronauts would sleep in spinning compartments. As it spins, passengers are pushed against the outer walls. The artificial
gravity
would help prevent bone loss and other health problems.
-
Exercise machines would help astronauts keep their muscles and bones strong. Solid waste from toilets could be used as compost for plants. The plants, in turn, would provide food and oxygen.
-
Mars' surface is cold and barren. But the ingredients for a warm, wet, fertile environment are all there. They're just frozen underground. Could we turn Mars into a livable planet? Some scientists think so!
-
Transforming Mars into an Earthlike planet would take hundreds or even thousands of years. And it would be very expensive. But we could learn a lot about how
climates
and ecosystems work.
-
Further out our
solar system
is the giant planet
Jupiter
. Did you know that it has at least 50 moons? One of its moons is the ice-covered Europa.
-
Scientists think that there may be a deep saltwater ocean beneath
Europa
's icy surface. On Earth, life exists wherever there is water. Is the same true on this moon? Future missions may find out!
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Image Credits:
background: spaceship vector silhouette, Space Shuttle, Bob Comix CC BY 4.0; rocket, satellite, Natasha Sinegina CC BY 4.0; Mike Shara, © AMNH; full moon, Gregory H. Revera CC BY-SA 3.0; Man on Moon, NASA; Transit Expandable Habitat, ©NASA; liquid mirror telescope illustration, courtesy of P.Hickson/University of British Columbia; Lunar elevator, ©AMNH; Aseroid Itokawa, © ISAS, JAXA via apod.nasa.gov; anchoring to surface of an asteroid, courtesy of NASA; Mars, ESA & MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA, CC BY-SA 3.0; Curiosity, © NASA; Nautilus-X spacecraft , © John Whitesel; Nautilus-X spacecraft w/inset of sleeping compartments , © John Whitesel; Nautilus-X spacecraft w/inset of exercise room, © John Whitesel; terraforming Mars, © Steven Hobbs; transforming Mars into Earthlike planet, courtesy of NASA; Jupiter family, NASA/JP; Europa, NASA.