I found an answer from www.quora.com

For how long do I have to aim a laser at the moon to see a dot ...

The first is simply how long would it take for a laser to travel to the moon and back . The moon is around 384000 km away. The speed of light is ...

For more information, see For how long do I have to aim a laser at the moon to see a dot ...

I found an answer from www.smithsonianmag.com

Dark Energy: The Biggest Mystery in the Universe | Science ...

Far from light and plunged into months-long darkness, Antarctica's South Pole ... The rest they call, for want of a better word, dark: 23 percent is something they call ... would not hold—based on what we can see of it, our galaxy doesn't have .... at the Apache Point Observatory Lunar Laser-ranging Operation (APOLLO) can ...

For more information, see Dark Energy: The Biggest Mystery in the Universe | Science ...

I found an answer from www.nationalgeographic.com

Extraterrestrial life probably exists. How do we search for aliens?

With next-generation telescopes, tiny space probes, and more, scientists aim to search ... The lasers create artificial guide stars that help astronomers correct for ... “51 Peg should have let everyone know it was going to be a crazy ride,” Seager says. ... power has also galvanized the decades-long search for intelligent aliens.

For more information, see Extraterrestrial life probably exists. How do we search for aliens?

I found an answer from www.khanacademy.com

Refraction in water (video) | Khan Academy

Sometimes if you look very closely you can see an image of a cloud in the .... can travel the longest. that is why radio waves which have a long wavelength like .... Let me draw two rays that are coming from this point on the straw right over here.

For more information, see Refraction in water (video) | Khan Academy

I found an answer from www.bbc.com

Everything you need to know about lasers (because people are ...

Nov 24, 2015 ... A super strength laser has left a British Airways co-pilot with severe damage to his eye. He's been undergoing treatment on his retina since it ...

For more information, see Everything you need to know about lasers (because people are ...

I found an answer from www.britannica.com

Moon - The lunar interior | Britannica.com

Combining all available data, scientists have created a picture of the Moon as a ... the core had an electromagnetic dynamo like that of Earth (see geomagnetic field), ... for the evidence that the crust is asymmetrical: thicker on the Moon's far side, .... At lower right, appearing as a dark spot with an inner white dot, is the crater ...

For more information, see Moon - The lunar interior | Britannica.com

I found an answer from en.wikipedia.org

Lunar Laser Ranging experiment - Wikipedia

The ongoing Lunar Laser Ranging experiment or Apollo landing mirror measures the distance between surfaces of Earth and the Moon using laser ranging.

For more information, see Lunar Laser Ranging experiment - Wikipedia

I found an answer from www.scientificamerican.com

Can a pocket laser damage the eye? - Scientific American

Red laser pointers that are "properly labeled" in the 3-5 mW range have not ... There are reports that green lasers, improperly imported to the U.S., far ... Second , the light bulb gives light in all directions so you only see a small part of the whole.

For more information, see Can a pocket laser damage the eye? - Scientific American

I found an answer from www.nasa.gov

About the Hubble Space Telescope | NASA

Dec 18, 2018 ... This photograph of NASA's Hubble Space Telescope was taken on ... They were placed far from city lights and as far above the haze of the atmosphere as possible. ... and light pollution, Hubble has an unobstructed view of the universe. ... Hubble can spot a night light on the surface of the Moon from Earth.

For more information, see About the Hubble Space Telescope | NASA