Space Travel and Exploration

The back part of a rocket is called the rocket nozzle. It is responsible for directing the flow of exhaust gases to generate thrust and propel the rocket forward.

The Great Wall of China is often cited as the only man-made object visible from space with the naked eye. However, this is a myth as many other large man-made structures are also visible from space, such as city lights at night or large dams.

The northern and southern Hemispheres each consist of a range of 90 degrees

of latitude. They meet at the equator ... it's the boundary between them. There's

no gap between them at the equator, so if you wanted to, you could go to the

equator and stand with one foot in each hemisphere. Each hemisphere is shaped

like ... like ... like a hemisphere. That's like half of a grapefruit. Their edges fit together

to make a complete sphere, and the distance between them at their edges, as well

as the angle between them, is zero.

As of 2021, over 9,000 rockets have been launched into space since the first one in 1957. This includes rockets carrying satellites, probes, and crewed missions by various space agencies and companies around the world.

Light travels the fastest, with a speed of 299,792 kilometers per second in a vacuum. Sound travels at around 343 meters per second in air. Microwaves travel slower in glass compared to a vacuum, but their speed is still faster than sound. A rocket in space can travel at speeds up to several kilometers per second, depending on its propulsion system.

Yuri Gagarin made his one and only space flight in April of 1961. He was launched,

made a little less than one complete orbit of the Earth, landed about an hour and

a half after launch, and never left Earth's atmosphere again after that.

People have developed rockets for various purposes, including space exploration, satellite deployment, scientific research, and national defense. Rockets allow us to overcome the Earth's gravity and propel objects into space, enabling advancements in technology, communication, and understanding of our universe.

The first Spacelab was carried aboard the Space Shuttle Columbia on STS-9 (Space Transportation System-9) mission in November 1983.

There are 13 countries which have the capability to launch satellites to orbit. Those are:

Soviet Union / Russia

United States

France

Japan

China

UK

India

Isrel

Russia

Ukrine

Iran

North Korea

South Korea

--note--

The above information is incorrect.

The Soviet Union does not exist since 1991. Russia and Ukraine inherited their space facilities from the former Soviet Union. Britain and France launch satellites under the aegis of the European Space Agency, which also launches satellites for many other countries. South Korea does not have an indigenous satellite launch ability at this time. Private corporations SpaceX and Orbital Sciences have been launching satellites for years.

I can definitely tell you Gagarin visited New Delhi and it was either in 1961 (year of flight) or 1962 september/october. (I left New Delhi in Jan. 1963). Most unforgettable is the fact that I actually saw him at close quarters and regret I missed a handshake. Our school located on Curzon Road, New Delhi was adjacent to the Soviet Embassy. One afternoon we saw a few cars arriving at the embassy gate. Many schoolmates recognised him and rushed towards the gate and Gagarin even got out and gave hand shakes to a few students but I was not among the lucky ones. The incident is still fresh in my mind.

Hari Rao, Bangalore

Yuri Gagarin became the first human to fly to space on April 12, 1961, aboard the Vostok 1 spacecraft. He completed one orbit around Earth during his historic mission.

The period of revolution or orbital revolution. For Earth, this is one year.

With current technology, it is not possible to travel to other galaxies due to the vast distances involved. The closest galaxy to our Milky Way is the Andromeda galaxy, but it is over 2 million light-years away. It would take millions of years to reach even the closest galaxy using current propulsion methods.

the mesosphere is ~35km thick ranging from 50km above the surface to 85km above the surface. the temperature changes rather linearly from 0 degrees at the start of the mesosphere and falls to nearly -100 degrees at the top of the mesosphere

It takes about 150 seconds (2.5 minutes) for the shuttle to get out of Earth's atmosphere to the edge of space, defined for most purposes as 62 miles (100 km.) above sea level.

The dog sent into space in 1957 was named Laika. She was a Soviet space dog aboard Sputnik 2.

The value of a Skylab medallion can vary depending on factors such as its condition, rarity, and current demand among collectors. Generally, Skylab medallions can range in value from around $50 to several hundred dollars. It's recommended to consult with a reputable coin or space memorabilia appraiser for a more accurate valuation.

As of October 2021, a total of about 580 people have been to space, starting from Yuri Gagarin's historic flight in 1961.

Bob asks you to find the three rocket parts - the Launch Button, the Thrust Unit, and the Control Module - in order to repair the spaceship and escape from the Maelstrom's forces in LEGO Universe.

To survive in outer space, a man needs to have oxygen, water, food, space suit, warm clothing. We would also need a gravitational force similar to earth's, otherwise we would suffer rapid muscle degeneration, and eventually death.

This is why astronauts must constantly exercise in space.

Space junk was first discovered in 1957 by the U.S. military tracking systems. The Soviet Union launched Sputnik 1, the first artificial satellite, which left debris in orbit around Earth, leading to the realization of space junk.

There were 2 space probes sent to orbit Mercury: Mariner 10 and Messenger. Both attained orbit and sent back information about the planet to Earth. Mariner 10 ran out of energy to send back signals to Earth, but, it is probably still in orbit. Messenger began it's mission earlier in 2011 and is still working, sending information back to Earth. Since rocket power would be needed to land a spacecraft on Mercury, (the planet has almost no atmosphere), there are no plans to land a vehicle on the planet, as it would take too much fuel than we can afford to put into spacecraft at this time. It's too expensive to send an unmanned vehicle that can safety land on Mercury. It's far too dangerous to send humans to Mercury and it will probably never, ever happen in the future.

The average cost for rocket fuel can vary widely depending on the type of fuel and the specific requirements of the mission. However, it can range from a few thousand dollars to tens of thousands of dollars per kilogram.

The distance a spaceship can travel in space depends on various factors such as its fuel supply, propulsion system, and spacecraft design. With current technology, missions to nearby planets like Mars are feasible, but interstellar travel to other star systems is still beyond our capabilities.

Rocket fuel is typically stored in fuel tanks within the rocket's structure. The tanks are often made of lightweight materials such as aluminum or composite materials to minimize weight. The fuel may be stored separately from the oxidizer in different tanks, or they may be stored together as a single fuel mixture.