How Far Away Is The Moon? - CLT Livre

How Far Away Is The Moon?

How Far Away Is The Moon
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How long would it take to get to the Moon?

It takes about 3 days for a spacecraft to reach the Moon. During that time a spacecraft travels at least 240,000 miles (386,400 kilometers) which is the distance between Earth and the Moon. The specific distance depends on the specific path chosen.

How far is Moon from Earth today?

As of September 22 2023, The Moon is 236,736 miles (380,908 kilometers) away from Earth, which is about 0.00254621910167 AU.

How far away is space?

Discussion –

  • Why do you think getting to space is so difficult when it’s only 62 miles away? Answer: Space is 62 vertical miles away. It takes a lot of energy to overcome gravity for that distance and gain the speed required to stay in orbit (approximately 17,500 miles per hour) once you’ve arrived.
  • How would the distance to space be different from Denver compared with Los Angeles? Answer: The distance to space from Denver is approximately 61 miles while it’s about 62 miles to space from Los Angeles. This is because Denver is 1 mile above sea level while Los Angeles is close to sea level.

How long until the Moon escapes the Earth?

The Earth no more orbits the Moon than the Sun orbits the Earth. At the speed the moon is moving away from Earth (3.8 centimeters a year), it would be completely out of Earth’s orbit in 50 billion years. However, the Sun is expected to become a red giant and engulf Earth and the Moon first, so it’s kind of irrelevant.

How long is a trip to Mars?

This shows an artist’s concept animation of the Perseverance cruise stage cruising to Mars. DISTANCE TRAVELED Loading. Loading. miles / km DISTANCE REMAINING Loading. Loading. miles / km The cruise phase begins after the spacecraft separates from the rocket, soon after launch.

The spacecraft departs Earth at a speed of about 24,600 mph (about 39,600 kph). The trip to Mars will take about seven months and about 300 million miles (480 million kilometers). During that journey, engineers have several opportunities to adjust the spacecraft’s flight path, to make sure its speed and direction are best for arrival at Jezero Crater on Mars.

The first tweak to the spacecraft’s flight path happens about 15 days after launch.

Can we see Earth from moon?

Henrike Holdrege – From In Context #18 (Fall, 2007) | View article as PDF I became interested in the earth as seen from the moon when I read two short paragraphs in the late Norman Davidson’s book, Sky Phenomena: A Guide to Naked-Eye Observation of the Stars,

Later I learned from Annelies Davidson, Norman’s wife, that Norman felt strongly about our responsibility to imagine worlds such as the moon and Mars, where human beings had set foot or landed technical equipment. In the following short essay I attempt to paint a picture of the visual relationship of the moon and earth.

All the facts mentioned can be known without traveling to the moon or making technical observations. In my reasoning I drew upon geometry and projective geometry, naked eye observations of our night sky, and studies of color phenomena following Goethe (in regard to which, see the article by Arthur Zajonc, ” Toward a Participative Science.” ) The moon in its illumination by the sun appears in our night sky from month to month in phases: new, waxing, full, waning, and new again.

The sun illuminates both moon and earth. And so the earth, seen from the moon, also appears in phases: full earth, waning earth, new earth, waxing earth and full earth again. When the moon is new for us, the earth is full for the moon; when the moon waxes, the earth wanes. The moon seen from the earth and the earth seen from the moon are complementary to each other: when the moon appears two-thirds illuminated, then the earth appears one-third illuminated.

Just as the moon shines onto the earth and brightens our night, the earth shines onto the moon. The earth shine is at its peak when the earth for the moon is full or almost full. We can observe this shine from down here on earth. The young crescent moon in the western sky on a clear night shows us the full moon disk: one part brightly lit by the sun, the other part, cradled in the bright crescent, dimly illuminated by the then almost full earth.

  • The earth, having a diameter about 3.7 times larger than the diameter of the moon, should appear in the moon sky as a disk with an area about 13 times larger than the apparent moon in our night sky.
  • The color of this large earth is blue, blue with white patches and streaks, offering different patterns of blue and white as the earth rotates on its axis and as cloud cover on earth changes.
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The moon, when rising over our horizon, often can be seen orange or red through a hazy atmosphere, like our sun at dawn and dusk. Since the moon does not have an atmosphere, there is no dawn or dusk; the sun on the moon rises and sets in a flash. Also because there is no atmosphere, the moon sky is always black and never blue.

During the moon’s day, in the extremely bright sunlight that is not being diffused and softened, the moonscape has sharp black shadows and offers hardly any color. Picture now over the barren moonscape in the black sky the large earth in its beautifully refreshing and quiet colors of blue and white. However, from only little more than one half the moon globe is the earth visible at all.

That is the portion that always faces the earth, the side of the moon we see when we look up at the moon. The side that is always turned away from the earth never sees us. The moon, seen from the earth, moves across our sky. Depending on the season, it rises somewhere between the northeast and southeast and sets between the northwest and southwest.

  • In winter, the full moon follows an arc about as high as the sun’s arc in summer; in summer the full moon makes an arc about as low as the sun’s in winter.
  • The earth in the moon sky, however, does not rise or set.
  • It remains almost stationary except for a small looping movement due to the moon’s libration.

Depending on the viewer’s location on the moon, the earth is either not visible at all or always positioned somewhere between close to the horizon and high in the sky. On earth, the sun rises and sets. On the moon, it also rises and sets. On earth, the full day lasts 24 hours.

On the moon, a moon day lasts much longer. From one sunrise to the next on the moon is 29.5 earth-days, a synodic month. For almost any place on the moon, the sun is up in the sky for about 15 earth-days, then down again for about 15 earth-days. The stars, too, rise and set and slowly make their arcs across the moon sky.

In the black moon sky, in daylight as at night, the blue and white earth is visible in its phases relating to the sun. And the earth alone, for the moon, rests in one place in the sky, rotating on its own axis. (See also Sky Phenomena: A Guide to Naked-Eye Observation of the Stars, by Norman Davidson.

How many flags are on the Moon?

A total of six flags have been planted on the Moon – one for each US Apollo landing.

Can a plane fly to space?

NASA – Why Can’t We Fly a Plane to Space? Why Can’t We Fly a Plane to Space? 01.08.04 This following is a question from the Phone Dr. MarcWeb site. The original answer can be found at, along with answers to many other space questions. Members of the Back Bay Astronomy Club in Virginia Beach, Virginia, say that people often ask this question.

Image above: Cross Section of an Airplane Wing. Air Flows Faster Over the Top than Underneath, so it Uses Less Pressure. Higher Pressure Air Underneath the Wing Pushes it Up.

Airplanes can fly because of air. The air moving under their wings is strong enough to hold them up. An airplane wing is round on top. The bottom is flat. The plane’s engines push the wing forward. At the same time, air moves over and under the wing. The air going above the wing has to go a little farther than the air going below.

  1. This is because of the wing’s shape.
  2. The air molecules on top are a little farther apart.
  3. This makes the air there a little thinner.
  4. It also makes less pressure on the top of the wing.
  5. There is more pressure on the bottom.
  6. So what happens? The wing is pushed up by the air under it.
  7. Large planes can only fly as high as about 7.5 miles.

The air is too thin above that height. It would not hold the plane up. Some kinds of planes can fly much higher. One special NASA plane, Helios, flew to about 19 miles. This is far higher than any other plane has gone. At that height, the air is about 100 times thinner than at sea level.

Image above: On August 13, 2001. Helios Flew Up to 96,863 Feet. That’s 18 Miles Straight Up!

Even a spacecraft in a low orbit is about 125 miles high. This is far above the thick air that we are used to. It is much higher than any plane can reach. You need a rocket to get to even the lowest Earth orbit. So, how is a rocket different from an airplane? Rockets do not need outside air to lift them.

  1. Rockets use some of the basic laws of nature.
  2. Scientist Isaac Newton discovered these laws over 300 years ago.
  3. One of these is called Newton’s third law.
  4. It says for every action there is an equal and opposite reaction.
  5. You can see this law when you blow up a balloon and let it go without tying it.
  6. The air rushes out of the mouth of the balloon.
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The balloon flies the other way. This law also tells us how to build a powerful rocket. The rocket needs to shoot out a lot of material. It must come out at a high speed. And, it must come out in the direction opposite of the way we want the rocket to go.

Image above: Rocket Carries a Fuel Tank. Fuel and Oxygen are Mixed Together and Ignited Combustion Chamber. Hot Gasses Shoot Out the Exhaust and Force the Rocket in the Opposite Direction.

Rockets make it possible to explore space. They also let us explore our own planet in ways we could never do even from an airplane. Visit, and click on “Do spacey things” to do a crossword about a “nine-eyed Earth watcher” that studies pollution in the atmosphere from space.

What existed before the Moon?

Earth-Moon distance explained by Astrophysicist Neil deGrasse Tyson #astronomy

Proto-Earth and Theia – Before Earth and the Moon, there were proto-Earth and Theia (a roughly Mars-sized planet). The giant-impact model suggests that at some point in Earth’s very early history, these two bodies collided. The Moon may have formed in the wake of a collision between an early proto-planet and an astronomical body called Theia. © Fernando Astasio Avila/ Shutterstock

  1. During this massive collision, nearly all of Earth and Theia melted and reformed as one body, with a small part of the new mass spinning off to become the Moon as we know it.
  2. Scientists have experimented with modelling the impact, changing the size of Theia to test what happens at different sizes and impact angles, trying to get the nearest possible match.
  3. ‘People are now tending to gravitate towards the idea that early Earth and Theia were made of almost exactly the same materials to begin with, as they were within the same neighbourhood as the solar system was forming,’ explains Sara.
  4. ‘If the two bodies had come from the same place and were made of similar stuff to begin with, this would also explain how similar their composition is.’

What if there was no moon?

What would happen to the seasons if the Moon disappeared? – Lastly and probably the most worrying, the Earth’s seasons could change substantially should the Moon disappear, We experience seasons on the Earth – spring, summer, autumn and winter – because the Earth is tilted,

  • Relative to the plane we orbit the Sun, Earth’s tilt is about 23.5 degrees.
  • It is the pull of the Moon’s gravity on the Earth that holds our planet in place.
  • Without the Moon stabilising our tilt, it is possible that the Earth’s tilt could vary wildly,
  • It would move from no tilt (which means no seasons) to a large tilt (which means extreme weather and even ice ages).

: What would happen if the Moon disappeared?

Can human survive in Mars?

The air on Mars – The Martian atmosphere is thin – its volume is only 1% of the Earth’s atmosphere. To put it another way, there’s 99% less air on Mars than on Earth. That’s partly because Mars is about half the size of Earth. Its gravity isn’t strong enough to keep atmospheric gases from escaping into space.

  • And the most abundant gas in that thin air is carbon dioxide.
  • For people on Earth, that’s a poisonous gas at high concentrations.
  • Fortunately, it makes up far less than 1% of our atmosphere.
  • But on Mars, carbon dioxide is 96% of the air! Meanwhile, Mars has almost no oxygen; it’s only one-tenth of one percent of the air, not nearly enough for humans to survive.

If you tried to breathe on the surface of Mars without a spacesuit supplying your oxygen – bad idea – you would die in an instant. You would suffocate, and because of the low atmospheric pressure, your blood would boil, both at about the same time. Billions of years ago, Mars’ Jezero Crater hosted an ancient lake.

Is Earth getting closer to the sun?

The effects of tides – Just as the moon ‘s gravitational pull results in tides on Earth, so does Earth’s gravity tug on the sun. This stretches the side of the sun that faces Earth, resulting in a “tidal bulge,” Britt Scharringhausen, an associate professor of physics and astronomy at Beloit College in Wisconsin, wrote for Cornell University’s Ask an Astronomer page.

The sun rotates on its axis about once every 27 days, according to NASA, Because this is faster than the 365 or so days it takes for Earth to complete an orbit around the sun, the tidal bulge Earth generates on the sun sits ahead of Earth. The bulge’s mass has a gravitational pull associated with it, tugging Earth ahead on its orbit and slinging it farther from the sun, Scharringhausen noted.

(A similar effect is leading Earth’s moon to slowly drift away from our planet,) However, these tidal forces have a very weak effect on Earth’s orbit: They cause Earth to move about 0.0001 inch (0.0003 cm) away from the sun every year, DiGiorgio calculated.

What is inside the Moon?

The Lunar Core – At the Moon’s center is a dense, metallic core. This core is largely composed of iron and some nickel. The Moon’s core is relatively small (about 20% of its diameter) compared to other terrestrial worlds (like Earth) with cores measuring closer to 50% of their diameters.

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How long would it take to get to Venus?

The following is just a selection, click here for a complete list. The shortest time a spacecraft has taken to get to Venus from Earth is 109 days, or 3.5 months. The longest journey took 198 days or 6.5 months. Most journeys take between 120 and 130 days which is about 4 months.

How long would it take to get to Jupiter?

How long does it take to get to Jupiter? Jupiter with Io and Ganymede taken by amateur astronomer Damian Peach. Credit: NASA / Damian Peach We’re always talking about Pluto, or Saturn or Mars. But nobody ever seems to talk about Jupiter any more. Why is that? I mean, it’s the largest planet in the solar system.318 times the mass of the Earth has got to count for something, right? Right? Jupiter is one of the most important places in the,

The planet itself is impressive; with ancient cyclonic storms larger than the Earth, or a magnetosphere so powerful it defies comprehension. One of the most compelling reasons to visit Jupiter is because of its moons. Europa, Callisto and Ganymede might all contain vast oceans of liquid water underneath icy shells.

And as you probably know, wherever we find on Earth, we find life. And so, the icy moons of Jupiter are probably the best place to look for life in the entire solar system. And yet, as I record this video in early 2016, there are no spacecraft at Jupiter or its moons.

In fact, there haven’t been any there for years. The last spacecraft to visit Jupiter was NASA’s New Horizons in 2007. Mars is buzzing with orbiters and rovers, we just got close up pictures of Pluto! and yet we haven’t seen Jupiter close up in almost 10 years. What’s going on? Part of the problem is that Jupiter is really far away, and it takes a long time to get there.

How long? Let’s take a look at all the spacecraft that have ever made this journey. The first spacecraft to ever cross the gulf from the Earth to Jupiter was NASA’s Pioneer 10. It launched on March 3, 1972 and reached on December 3, 1973. That’s a total of 640 days of flight time.

  • But Pioneer 10 was just flying by, on its way to explore the outer solar system.
  • It came within 130,000 km of the planet, took the first close up pictures ever taken of Jupiter, and then continued on into deep space for another 11 years before NASA lost contact.
  • Pioneer 11 took off a year later, and arrived a year later.

It made the journey in 606 days, making a much closer flyby, getting within 21,000 kilometers of Jupiter, and visiting Saturn too. Next came the Voyager spacecraft. Voyager 1 took only 546 days, arriving on March 5, 1979, and Voyager 2 took 688 days. NASA’s Juno spacecraft launched on August 6, 2011 and should arrive at Jupiter on July 4, 2016. Credit: NASA / JPL So, if you’re going to do a flyby, you’ll need about 550-650 days to make the journey. But if you actually want to slow down and go into orbit around Jupiter, you’ll need to take a much slower journey.

  1. The only spacecraft to ever stick around Jupiter was NASA’s Galileo spacecraft, which launched on October 18, 1989.
  2. Instead of taking the direct path to Jupiter, it made two gravitational assisting flybys of Earth and one of Venus to pick up speed, finally arriving at Jupiter on December 8, 1995.
  3. That’s a total of 2,242 days.

So why did Galileo take so much longer to get to Jupiter? It’s because you need to be going slow enough that when you reach Jupiter, you can actually enter orbit around the planet, and not just speed on past. And now, after this long period of Jupiterlessness, we’re about to have another spacecraft arrive at the massive planet and go into orbit.

NASA’s Juno spacecraft was launched back on August 5, 2011 and it’s been buzzing around the inner solar system, building up the velocity to make the journey to Jupiter. It did a flyby of Earth back in 2013, and if everything goes well, Juno will make its orbital insertion into the Jovian system on July 4, 2016.

Total flight time: 1,795 days. Once again, we’ll have a observing Jupiter and its moons. This is just the beginning. There are several more missions to Jupiter in the works. The European Space Agency will be launching the Jupiter Icy Moons Mission in 2022, which will take nearly 8 years to reach Jupiter by 2030.

NASA’s Europa Multiple-Flyby Mission will probably launch in the same timeframe, and spend its time orbiting Europa, trying to get a better understand the environment on Europa. It probably won’t be able to detect any life down there, beneath the ice, but it’ll figure out exactly where the ocean starts.

So, how long does it take to get to Jupiter? Around 600 days if you want to just do a flyby and aren’t planning to stick around, or about 2,000 days if you want to actually get into orbit. Citation : How long does it take to get to Jupiter? (2016, April 7) retrieved 27 September 2023 from https://phys.org/news/2016-04-jupiter.html This document is subject to copyright.