Science

12 men in total have walked on the moon and all were from the US.

natural plasma- sunlight, artificial plasma- tube light

There is no specific and accurate answer to this question because various countries, including India, sent various spy missiles into spaces. But, as far as google is concerned, there are some 8000 objects that are accounted for by various governments that have been sent into space for various purposes.

In science, interior typically refers to the inside or central part of an object, organism, or system. It can also refer to the inner regions of planets, stars, or other celestial bodies.

Johannes Kepler realized that the orbit of Mars is an ellipse with the Sun at one of the foci. This was one of his three laws of planetary motion, known as Kepler's First Law.

Vestigial.

Dr. Roberta Bondar, the first Canadian female astronaut, went into space on January 22, 1992.

In classical physics it was thought that every physical quantity has a "true value" that can be only estimated through measurements due to measurements errors. The way of getting nearer and nearer to this "true value" was thought on one side to increase the measurement accuracy, on the other side to increase the number of measurements so to use statistical methods to attenuate the effect of random errors.

The situation is completely changed with quantum mechanics. In quantum mechanics an "intrinsic" inaccuracy affects all the physical quantities, independently of measurement errors. Thus physical quantities would be random variables even if measured by an ideal instrument with no bias and no random error. Thus, in modern physics no physical quantity "true value" exists.

The only exception is the very rare and particular case of quantum self-state of a certain variable, where that variable only ha a precise value (but not the other variables of the problem !). However this is an extreme and unpractical case, and it seems to me not the case of going in deep in its explanation here.

Empty space , maybe dark matter and dark energy. Then there are other galaxies (about 100 billion of them that we could see if we looked). A galaxy that is close to ours is Andromeda which may be similar in shape to the Milky Way (some recent research claims that the Milky was is not a spiral galaxy at all but a barred elliptical galaxy). Andromeda is about 2 million light years away.

An eye doctor would need to measure the distance to the retina to correct nearsightedness or farsightedness. Nearsightedness occurs when the focal point of light falls short of the retina, so the goal is to adjust the focus point onto the retina. Farsightedness happens when the focal point falls beyond the retina, so the focus point needs to be moved closer to the retina.

During the Moon's revolution, an observer in space would see the moon, but would not be able to see it spin around. From far to the north, about the solar system, the moon would appear to make a squiggly

Yes. The fruit flies flew (haha) before the dogs did.

Fruit flies were launched on a V2 rocket from White Sands in New Mexico, to the edge of space in July 1946 to study the effects of high-altitude radiation. The rocket reached an altitude of about 100 miles.

Belka and Strelka, two Soviet dogs, were the first living creatures to return from space. However, Laika, another dog was the first dog in space, and also the first living creature to orbit the earth. But about five to seven hours into the flight, she died from overheating and stress. Also, 40 mice, some plants and two rats were sent into space with Belka and Strelka.

carbon is an element ..

but it has a self linking property wherein more than one carbon atoms link together to form a molecule

The Canadarm was not invented in 2004 seeing as the first Canadarm was used in 1981.

is a common myth that a ducks quack does not echo, however this is untrue. The University of Salford have proved that a ducks quack echoes by using a reverberation chamber. There are a number of explainations for why this myth has arised. One is that the echo of a ducks quack is usually too quiet to hear because they quack too quietly for the reflection of the sound to be heard. Another possible reason is that ducks don't quack near reflecting surfaces

The first electric telescope was not invented by a single individual, but rather it refers to a telescope that is motorized or has electronic features to aid in its operation. The specific inventor or creators of the first electric telescope are not widely credited or known.

In general terms any unusual natural event was seen as a sign from the Gods, or a portent of something that was to happen.

In Norse Mythology the Sun was chased across the sky every day by the Wolf Skoll. Skoll was intent on devouring the Sun and it was believed that Skoll was taking bites out of the Sun during the Eclipse.

Of course the Sun would magically reappear to light the world but the skalds told that at Ragnarok then Skoll would be sated and darkness and ice would cover Midgard.

When skin is exposed to sunlight, the body produces more of a pigment called melanin. Melanin acts as a natural defense against UV radiation by absorbing and dissipating it, helping to protect skin cells from damage. This increase in melanin production leads to darker skin as a way of shielding the body from excessive sun exposure.

There are eight known planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Additionally, there are five recognized dwarf planets: Pluto, Eris, Haumea, Makemake, and Ceres. The solar system also contains numerous moons, asteroids, comets, and other smaller celestial bodies.

2007 nobel prize winners peace - Albert Gore Jr chemistry - Gerhard ertl physics - albert fert peter grunberg medicine - Mario r., capecchi, sir martin j. evans, oliver smithies literature - doris lessing

The Stars and Constellations have always been helpful in human history.

Constellations are helpful to find your way if you are exploring or on the sea. They also can indicate the seasons of the year.

For serious or professional astronomers, the constellations were once the best method for locating specific places in the night sky. Today, with the array of powerful technologies that are available, the constellations are no longer essential for that purpose. Some naming conventions for stars and other celestial bodies still make use of an object's location within a given constellation. Technologies are available to amateur astronomers as well, but many of these astronomers have great facility locating objects in the sky by knowing the constellations and knowing how to visually estimate positions.

By studying the sky, people also learned about harvesting seasons and when to plant crops (though, that was mostly thanks to the sun and moon and less the stars).

In Physics , space and time are combined to become a "Space Continuum". This mathematical concept is known as â??space-time" and has space representing the first three dimensions and time the fourth. By combining space and time into a "Minowski Space", Physicists have simplified the workings of space at both subatomic and super galactic levels.

The three primary colors of light are red, blue, and green.

Redox reactions are used in batteries to generate electricity, in corrosion prevention to protect metals, in wastewater treatment to remove contaminants, and in chemical synthesis to produce specific compounds.