space is confusing!?

Question

space confuses me!!!!!!!!!!!!!!!!! i don't get it at all! like how many galaxies r there? whats with the milky way? y is there a huge black part beside our planets? its sooooo freakin confusing!i hate space!

Answer 1

Anything which is not understood fully and a complete picture is not available is bewildering and confusing. There are many things to be answered on galaxies and astronomy to get a clearer picture to emerge. Scientists have theories and counter theories. The quest continues.
VR

Answer 2

Lol. But you are living in one. What is the matter with us humans. We hate the reality and embrace the imagination. There is nothing freaky or confusing about the reality. Everything makes sense one way or another. Now to answer you questions, there are many galaxies. A galaxie is a group of stars and planets that move in approximately same orbit. The milky way galaxie is the galaxie which is closes to us. Hence, we are part of milky way galaxie but a bit off it. The black part is called the dark matter and noone knows exactly what it is, but just because it is unknown does not mean it is freaky. If you can't think of space in 3D terms, then use the analogy of a book. If you want to find a sentence in the book, then you must shuffle through the pages to find it. Pages represent distance travelled. It is not hard if you know how to analyze it. You were born with the instinct of what space is, and orientation in space is a part of every living creature.

Answer 3

Space can be a confusing place, but that's irrelevant. You just seem like a moron. Regardless, I'll explain some basics.

The universe as we know it is a mostly empty place. It's made up of about 4% atoms, 21% Dark Matter, and 75% Dark Energy. Dark Matter and Dark Energy are theoretical masses used to explain things, and are called dark because we can't see them. About 15 billion years ago, very roughly, our Universe was just being created. Today, background radiation proves that the Universe is expanding, so it seems logical to assume that, if you travelled back in time, it would evenetually shrink to the point where it didn't exist. You seem more interested in current space, though, so I'll go there. Much of the Universe we see if made of stars. There are hundreds of billions of stars in each galaxy, and hundreds of billions of galaxies. Galaxies are formed around black holes, which I'll explain later. Each star in each galaxy is very large, and made of mostly hydrogen. It is so large that it's gravitational pull created massive amounts of pressure on this hydrogen, creating enormous amounts of heat, which causes nuclear reactions. Over billions of year (Or millions, in the case of a Hypernova), all of the hydrogen in a star will have been used up. Once this happens, in general, one of 3 things can happen. If the star is the size of our sun, it will expand rapidly, as it burns off the rest of it's fuel. Unless we can engineer a way to move the planet further back in the next few billions of years (Fairly likely, assuming we sirvive that long), this will be how the Earth ends. After the sun expands rapidly, like so, it will condense into a white dwarf, which is simply a dead star. It will still have the same mass, so the planets will still revolve it, but it won't give off light, so it'll be dark. Also, Mercury, Venus, and Earth will no longer exist, as the previous phase would have destroyed them.

In the second case, a star is about 50 times larger than out sun. It still expands to an enormous size, but it also condenses much further. It shrinks to a size just a few (hundred or thousand) miles across, with a huge density. A density so great that a simple teaspoon of material from such a star would weigh 50,000 pounds on Earth, believe it or not. These are called Neutron stars.

In the 3rd case, the star is MUCH larger than the sun, and the previous star. When it dies, it's gravity is so great that is condenses all the way. All of it's matter goes down to a single point, and it's density becomes infinite. When this happens, it's gravitational pull approaches infinity as you approach the black hole. It is called a black hole because it's gravity is so strong, no light can escape, which means we see it as dark. However, if light could escape, they wuld probably be fairly bright.

As for the Milky Way, it is the name of our galaxy. Just like Andromeda is the name of the closest galaxy to us, and many other galaxies are names. Naming a galaxy is like naming a star.

There is, obviously, much more, but I'm bored.

Answer 4

The Milky Way is the name of the galaxy is that our solar system is in. It is not known how many galaxies there are. The center of the planet is molten. Black holes are areas of the universe where
matter is so dense that the gravitational pull is so strong that nothing including light can escape it's pull.

Answer 5

You need to read, kid. Books, magazines, articles, whatever you find. The more you read on any subject, the more it will make sense and the more you will understand it.
Places to start:
- Astronomy magazine (paper, and online at www.astronomy.com
- NASA's website for some cool videos, articles, and info

And if you hate space, why ask the questions.

Answer 6

It isn't that confusing to me. But you don't have to like it. Everyone doesn't have to like it.

Answer 7

i have nothing to say except the fact i am extremely appalled

Answer 8

then you'll never know why your so confused

Answer 9

Outer space
From Wikipedia, the free encyclopedia
Jump to: navigation, search
"Deep space" redirects here. For the NASA space probes, see Deep Space 1 and Deep Space 2.

Layers of Atmosphere - not to scale (NOAA)Outer space, also simply called space, refers to the relatively empty regions of the universe outside the atmospheres of celestial bodies. Outer space is used to distinguish it from airspace (and terrestrial locations). Contrary to popular understanding, outer space is not completely empty (i.e. a perfect vacuum) but contains a low density of particles, predominantly hydrogen gas, as well as electromagnetic radiation.


[edit] Earth's boundary
There is no clear boundary between the Earth's atmosphere and space as the density of the atmosphere gradually decreases as the altitude increases. Nevertheless, the Federation Aeronautique Internationale has established the Kármán line at an altitude of 100 km (62 miles) as a working definition for the boundary between atmosphere and space. This is used because, as Karman calculated, above an altitude of roughly 100 km, a vehicle would have to travel faster than orbital velocity in order to derive sufficient aerodynamic lift from the atmosphere to support itself. The United States designates people who travel above an altitude of 80 km (50 statute miles) as astronauts. During re-entry, 120 km (75 miles) marks the boundary where atmospheric drag becomes noticeable. And in all honesty josh boone is an idiot if he believes that rockets are going to tear holes in the earths outer layer


[edit] Solar System
Outer space within the solar system is called interplanetary space, which passes over into interstellar space at the heliopause. The vacuum of outer space is not really empty; it is sparsely filled with several dozen types of organic molecules discovered to date by microwave spectroscopy. According to the Big bang theory, 2.7 K blackbody radiation was left over from the 'big bang' and the origin of the universe, and cosmic rays, which include ionized atomic nuclei and various subatomic particles. There is also gas, plasma and dust, and small meteors and material left over from previous manned and unmanned launches that are a potential hazard to spacecraft. Some of this debris re-enters the atmosphere periodically.

The absence of air makes outer space (and the surface of the Moon) ideal locations for astronomy at all wavelengths of the electromagnetic spectrum, as evidenced by the spectacular pictures sent back by the Hubble Space Telescope, allowing light from about 13.7 billion years ago, back almost to the time of the Big Bang to be observed. Pictures and other data from unmanned space vehicles have provided invaluable information about the planets, asteroids and comets in our solar system.


[edit] The "vacuum of space"
While not being an actual perfect vacuum, outer space contains such sparse matter that it can be effectively thought of as one. The pressure of a vessel kept at sea-level atmospheric pressure and the surrounding area is equal to roughly 101 kPa, roughly equal to a vessel at an underwater depth of about 10 metres (34 ft)[citation needed].

Contrary to popular belief, a person suddenly exposed to the vacuum would not explode, freeze to death, or die from boiling blood, but would take a short while to die by asphyxiation (suffocation). Air would immediately leave the lungs due to the enormous pressure gradient, and so any dissolved oxygen in the blood would empty into the lungs to try to equalise the partial pressure gradient. Once the deoxygenated blood arrived at the brain, death would quickly follow. Water vapor would also rapidly evaporate off from exposed areas such as the lungs and cornea of the eye, cooling the body.


[edit] Satellites
There are many artificial satellites orbiting the Earth, including geosynchronous communication satellites 35,786 km (22,241 miles) above mean sea level at the Equator. Their orbits never "decay" because there is almost no matter there to exert frictional drag because the pull of the earth's gravity is canceled by their centrifugal acceleration. There is also increasing reliance, for both military and civilian uses, of satellites which enable the Global Positioning System (GPS). A common misconception is that people in orbit are outside Earth's gravity because they are obviously "floating". They are floating because they are in "free fall": the force of gravity and their linear velocity is creating an inward centripetal force which is stopping them from flying out into space. Earth's gravity reaches out far past the Van Allen belt and keeps the Moon in orbit at an average distance of 384,403 km (238,857 miles). The gravity of all celestial bodies drops off toward zero with the inverse square of the distance.


[edit] Milestones on the way to space
Sea level - 101.3 kPa (1 atm; 1 bar; 760 mm Hg; 14.5 lbf/in²) of atmospheric pressure
4.6 km (15,000 ft) - FAA requires supplemental oxygen for aircraft pilots and passengers.
5.0 km (16,000 ft) - 50 kPa of atmospheric pressure
5.3 km (17,400 ft) - Half of the Earth's atmosphere is below this altitude.
8.0 km (26,247 ft) - Death zone for human climbers
8.8 km (29,035 ft) - Summit of Mount Everest, the highest mountain on Earth (26 kPa)
16 km (52,500 ft) - Pressurized cabin or pressure suit required.
18 km (59,000 ft) - Boundary between troposphere and stratosphere
20 km (65,600 ft) - Water at room temperature boils without a pressurized container. (The popular notion that bodily fluids would start to boil at this point is false because the body generates enough internal pressure to prevent it.)
24 km (78,700 ft) - Regular aircraft pressurization systems no longer function.
32 km (105,000 ft) - Turbojets no longer function.
34.7 km (113,740 ft) - Altitude record for manned balloon flight
45 km (148,000 ft) - Ramjets no longer function.
50 km (164,000 ft) - Boundary between stratosphere and mesosphere
80 km (262,000 ft / 50 mi) - Boundary between mesosphere and thermosphere. USA definition of space flight.
100 km (328,084 ft) - Kármán line, defining the limit of outer space according to the Fédération Aéronautique Internationale. Aerodynamic surfaces ineffective due to low atmospheric density. Lift speed generally exceeds orbital velocity. Turbopause.
120 km (400,000 ft) - First noticeable atmospheric drag during re-entry from orbit
200 km - Lowest possible orbit with short-term stability (stable for a few days)
307 km (166 nm) - STS-1 mission orbit
350 km - Lowest possible orbit with long-term stability (stable for many years)
360 km - ISS average orbit, which still varies due to drag and periodic boosting.
390 km - Mir mission orbit
440 km - Skylab mission orbit
587 km (317 nm) - STS-103 / HST orbit
690 km - Boundary between thermosphere and exosphere
780 km (485 miles) - Iridium orbit
20,200 km (12,600 mi) - GPS orbit
35,786 km (22,240 statute miles) - Geostationary orbit height
62,377 km (38,759 mi) - Lunar gravity exceeds Earth's (Apollo 8) on that plane
363,104 km - Lunar perigee

[edit] Regions of outer space
Cislunar space
Interplanetary space
Interstellar medium
Intergalactic space

[edit] Space does not equal orbit
To perform an orbital spaceflight, a spacecraft must travel faster than for a sub-orbital spaceflight. A spacecraft has not entered orbit until it is traveling with a sufficiently great horizontal velocity such that the acceleration due to gravity on the spacecraft is less than or equal to the centripetal acceleration caused being its horizontal velocity (see circular motion). So to enter orbit, a spacecraft must not only reach space, but must also achieve a sufficient orbital speed (angular velocity). For a low Earth orbit, this is about 7.9 km/s (18,000 mph). Konstantin Tsiolkovsky was the first to realize that, given the energy available from any available chemical fuel, a several-stage rocket would be required. The escape velocity to pull free of Earth's gravitational field altogether and move into interplanetary space is about 40,000 km/h (25,000 mph or 11,000 m/s). The energy required to reach velocity for low Earth orbit (32 MJ/kg) is about twenty times the energy required simply to climb to the corresponding altitude (10 kJ/(km·kg)).

So there is a major difference between sub-orbital and orbital spaceflights. The minimum altitude for a stable orbit around the Earth (that is, one without significant atmospheric drag), begins at around 350 km (220 miles) above mean sea level. A common misunderstanding about the boundary to space is that orbit occurs simply by reaching this altitude. Achieving orbital speed can theoretically occur at any altitude, although atmospheric drag precludes an orbit that is too low. At sufficient speed, an airplane would need a way to keep it from flying off into space, but at present, this speed is several times greater than anything within reasonable technology.