Molecule
Conceptual diagram of a methane molecule consisting of a carbon atom surrounded by four hydrogen atoms. The molecular formula for this is CH4.
A molecule consists of two or more atoms chemically bound together. The atoms may be: ...
List of molecules in interstellar space
This is a list of molecules that have been detected in the interstellar medium as of 2005.
Molecules are groups of two or more atoms bound together by electromagnetic forces. Like atoms, molecules exist in energy states that obey rules similar to those governing the internal structure of atoms.
molecule A tightly bound collection of atoms held together by the electromagnetic fields of the atoms. Molecules, like atoms, emit and absorb photons at specific wavelengths.
moon A small body in orbit about a planet.
molecule
a combination of two or more atoms that represents the smallest part of a compound that has the chemical properties of that compound
moon ...
MOLECULE - Collection of atoms held together by chemical bonds into a discrete, finite structure.
molecule: Two or more atoms bonded together.
momentum: The tendency of a moving object to continue moving; mathematically, the product of mass and velocity.
morning star: Any planet visible in the sky just before sunrise.
Molecules
The smallest units of a chemical compound. A molecule is composed of two or more atoms, linked by interactions of their electrons.
Molybdenum ...
Organic molecule - A molecule containing carbon
Outflow channel - A Martian valley with few tributaries probably formed by the sudden melting and runoff of sub-surface water ...
Molecule
In chemistry, a molecule is defined as a sufficiently stable, electric charge neutral group of at least two atoms in a definite arrangement held together by very strong chemical bonds....
unit of currency
Currency ...
Molecules, such as O2, have more degrees of freedom than single atoms: they can have rotational and vibrational motions as well as translational motion. An increase in temperature will cause the average translational energy to increase.
Molecule The smallest part of any substance which has the qualities of that substance, and which can exist alone in a free state. As an example, a molecule of water consists of two atoms of hydrogen and one of oxygen.
molecules and neutral metals
Red giants can get up to about 50 times the size of the Sun. Supergiants are between 20 times the size of the Sun for the BO supergiants and 1000 times the size of the Sun for the M0 supergiants.
molecule - (n.)
A collection of atoms bound together that is the smallest collection that exhibits a certain set of chemical properties, ...
Molecule
A tightly knit group of two or more atoms bound together by electromagnetic forces among the atoms' electrons and nuclei. For example, water (H2O) is two hydrogen atoms bound with one oxygen atom.
Molecules in interstellar space. As of late 1974, at least 33 molecular species had been identified with reasonable certainty: methylidyne CH, ionized methylidyne CH+, the cyanogen radical CN, the hydroxyl radical OH, ammonia NH3, water vapor H2O, ...
The molecules of glucose produced are usually linked with other molecules to form more complex carbohydrates. Other products of photosynthesis are formed by incorporating mineral elements into the process.
All molecules emit radiation. HIRDLS specifically measures the infrared radiation emitted by molecules. Although we cannot see infrared light with our eyes, it is just as real as visible light, but with longer wavelengths and lower frequencies.
The molecules produced by the smokeless gunpowder used in military cannon are far too heavy--and therefore, too slow--for sending payloads into space.
The molecules of crystals of most materials are optically asymmetrical; that is, they have no plane or center of symmetry. Asymmetrical materials have the power to rotate the plane of polarization of plane-polarized light.
Some molecules have large internal magnetic fields, or "moments". Just like a tiny bar magnet, these molecules will align themselves with an external magnetic field.
atom, molecule, nucleus, proton, neutron, electron
scientific notation
Proxima Centauri ...
The CO molecule possesses a bond length of 0.1128 nm.[14] Formal charge and electronegativity difference cancel each other out. The result is a small dipole moment with its negative end on the carbon atom[15].
The gas molecules in the atmosphere scatter the higher-energy (high frequency) blue portion of the sunlight more than they scatter the lower-energy red portion of the sunlight (this is called Raleigh scattering, ...
organic molecules,
mineral deposits,
possible microscopic fossils of bacterialike organisms that lived on Mars more than 3.6 billion years ago.
Tiny structures in the rock resembled single-celled terrestrial bacteria.
Complex molecule composed of amino acid units.
proton
A positively charged atomic particle contained in the nucleus of atoms. The nucleus of a hydrogen atom.
CO is a molecule made from a carbon and an oxygen atom. It is normally a gas on Earth, and is monitored in vehicle emissions because it is toxic.
Atoms and molecules may change states when they absorb specific amounts of energy. Atomic states are defined by the arrangement of electrons in atomic orbitals.
However, the molecules in the nebula have energy of their own, which resist this collapse. The cloud will only collapse if its mass is large enough to allow this - a mass called the "Jean's Mass." This is derived from the Virial Theorem (left).
"If the water molecules are as mobile as we think they are - even a fraction of them - they provide a mechanism for getting water to those permanently shadowed craters," says Pieters.
free molecule flow 1. A flow regime in aerodynamics in which molecules emitted from an object, as it passes through a resistive medium, do not affect the flow of oncoming molecules by scattering interactions, i.e.
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259. Molecule
Two or more atoms bonded together.
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260. Momentum
The measurement of the amount of motion. the product of mass and velocity.
Ammonia: A gas molecule composed of one part nitrogen and three parts hydrogen; NH3.
The remaining major molecules that have been observed in Saturn's atmosphere are methane (CH ) and ammonia (NH ), which are a factor of two to five times more abundant relative to hydrogen than in a gas of solar composition.
An process in which molecule on the high velocity tail of the Maxwell distribution escape. Thermally driven escape is negligible for planet-sized bodies for all but the lightest elements (H2 and He).
Also, the phenomenon by which water is held in interstices above the normal hydrostatic level, due to attraction between water molecules.
spectral lines Molecules (and individual atoms) can exist in different energy states. When a molecule jumps from a high energy state to a lower one, it puts out energy.
Spectral lines result from discrete changes in the energy of an atom or molecule. Different atoms or molecules can be identified by the unique sequence of spectral lines associated with them.
One region of the spectrum, in particular, has attracted a lot of attention: the range of relatively noise-free frequencies (or channels) where hydrogen (H) and a hydroxyl molecule (OH) give off or absorb characteristic radiation.
They are cool, around 10 K (this is logical since there are a lot of molecules in them which would not normally exist in a hot environment).
Gases are generally found in molecular form, with such molecules as H2, CO, CO2, CH, H2O, SiO, etc.
Because of the limitations in what kinds of H2 can be observed, and where, The most useful tracer of molecular gas has long been the trace molecule CO, which has a "fundamental" J=0--1 transition at 2.
See also: Fireball, Meteor, Meteoroid, Micrometeorite Meteoroid A solid object moving in interplanetary space, of a size considerably smaller than a asteroid and considerably larger than an atom or molecule.
A third source of radio waves within our own galaxy consists of the atoms and molecules in the interstellar matter. This radiation is at discrete frequencies instead of over a broad band, or continuum, of frequencies.
Some types of atoms such as neutral metals (and also molecules) have lots of closely spaced orbits that respond to relatively low energy photons. In the figure above, these are Calcium (Ca) and Iron (Fe).
Class G and K giants are known for having the cyanogen molecule (CN) in their atmospheres (indeed, the molecule is important in their classifications).
Temperature is a measure of the average heat or thermal energy of the molecules in a substance. The atoms and molecules in a substance do not always travel at the same speed.
Due to the abundance of hydrogen, the hydrogen-based molecules - such as methane, ammonia, and water - predominate.
electromagnetic spectroscopy - The study electomagnetic radiation spectra given off or absorbed by atoms or molecules changing energy levels.
Atomic absorption spectroscopy ...
Zeiger (1925- ) in 1954, and made use of the frequency of the ammonia molecule.
Consider a water molecule in the ocean. It is attracted gravitationally by the Earth, ...
Astronomers can finally breathe a sigh of relief: A team of scientists has discovered the first oxygen molecules in deep space, capping a nearly 230-year search for the elusive cosmic molecule.
This amazing find is the first sugar (and one of the most complex molecules) found in space. This molecule was detected by Jan M. Hollis (NASA/Goddard), Frank J. Lovas (University of Illinois), and Philip R.
These microwave emissions could be generated from water molecules in a planet's atmosphere when they are excited by the infrared light of its host star.
The parent molecules are mainly split up by energetic ultraviolet radiation from the Sun into simple compounds. These are not necessarily like stable chemicals that we know on the Earth but are simple combinations of atoms.
Carbon is unrivaled in its ability to form strong bonds, and in its ability to form the complex molecules that can store and transfer enormous amounts of information -- one of the hallmarks of life.
In the meantime, biochemists had been hunting for the biochemical basis of the gene, and had zeroed in on a molecule known as "deoxyribonucleic acid (DNA)" commonly found in chromosomes as the agent of heredity.
Definition: spectral line: Light given off at a specific frequency by an atom or molecule.
Spectral line: Light given off at a specific frequency by an atom or molecule. Every different type of atom or molecule gives off light at its own unique set of frequencies.
The diminishing of light from astronomical objects due to the earth's atmosphere, in which molecules (air, dust, etc.) of the atmosphere absorb, reflect, and refract light before it reaches the ground.
Light given off at a specific frequency by an atom or molecule. Every different type of atom or molecule gives off light at its own unique set of frequencies; thus, ...
 See also: Light, Earth, Energy, Sun, Solar
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