There is strong evidence that some bacteria can survive strong ultraviolet light from the sun and
other space radiation.
Not exact matches
NASA and
other space agencies have known for decades that this
radiation can cause cancer and
other cell damage.
Outer
space may look mostly empty, but it's actually packed with cosmic
radiation — gamma rays and charged particles produced by exploding stars, black holes and
other violent astrophysical phenomena.
Some models suggest that a flip would be completed in a year or two, but if, as
others predict, it lasted decades or longer we would be left exposed to
space radiation.
«These data are a fundamental reference for the
radiation hazards in near Earth «geospace» out to Mars and
other regions of our sun's vast heliosphere,» says CRaTER principal investigator Nathan Schwadron of the UNH Institute for the Study of Earth, Oceans, and
Space (EOS).
Says Zeitlin, «This is the first study using observations from
space to confirm what has been thought for some time — that plastics and
other lightweight materials are pound - for - pound more effective for shielding against cosmic
radiation than aluminum.
The country's newest
space lab, Tiangong - 2, for example, hosts a number of scientific payloads, including an advanced atomic clock and a $ 3.4 - million detector called POLAR for the study of γ - ray bursts — blasts of high - energy
radiation from collapsing stars and
other sources.
While the Johns Hopkins team studies the likely effects of
radiation on the brain during a deep
space mission,
other NASA - funded research groups are looking at the potential effects of
radiation on
other parts of the body and on whether it increases cancer risks.
So when NASA launched a gamma - ray telescope into
space in 2008, astronomers figured the high - energy
radiation it detected would point the way to easily identifiable supernova remnants, black holes, and
other extroverted objects.
Our new semi-immortals, people of indefinite and unknown longevity, would be a diverse population resistant to all viruses, known and unknown, all
other pathogens, and all forms of cancer, autoimmune diseases, environmental toxins, and even
radiation — that last attribute particularly handy for
space travel.
And
space physicians still need to find ways to limit
other hazards of human spaceflight that don't have anything to do with weightlessness, such as disturbed sleep and exposure to cosmic
radiation.
This so - called Cherenkov
radiation offers clues about supernovas and
other explosions in
space.
Now, one team of cosmologists has used the oldest
radiation there is, the afterglow of the big bang, or the cosmic microwave background (CMB), to show that the universe is «isotropic,» or the same no matter which way you look: There is no spin axis or any
other special direction in
space.
In a new paper in Scientific Reports, FSU Dean of the College of Human Sciences and Professor Michael Delp explains that the men who traveled into deep
space as part of the lunar missions were exposed to levels of galactic cosmic
radiation that have not been experienced by any
other astronauts or cosmonauts.
George lists a number of observations purportedly supporting multiverse theories that are dubious at best, like evidence that certain constants of nature aren't really constant, evidence in the cosmic microwave background
radiation of collisions with
other universes or strangely connected
space, etc..
Moreover, any manned outpost on Phobos would be well shielded from
space radiation — protected on one side by Mars and on the
other by the satellite's own bulk.
Creating the ability to more quickly and accurately forecast
space weather would give satellite operations teams,
space programs and
others technologies that rely on assets in Earth's
space environment the ability to reposition satellites and / or shut down noncritical components as well as defer critical operations — such as uploading new software or orbital maneuvers — that might be adversely affected by storm effects, such as increased penetrating
radiation.
In 2009, the Spitzer
Space Telescope discovered infrared
radiation from a ring far beyond all the
others encircling Saturn; sunlight heats the ring's dust, which emits its heat at infrared wavelengths.
Solar storms can at times create
radiation damage or introduce errors in satellite or spacecraft computer processors, causing them to function unpredictably, malfunction (sometimes permanently) or «misbehave» in
other ways, Anderson says, adding that much of this activity goes unreported to the public because, particularly in commercial
space - based systems, operators tend to be very reticent to admit they have had a problem that might discourage investors.
Understanding the risks of
radiation and the
other extreme environments of
space flight «is critical to provide safe passage for human exploration to the moon and Mars,» says microbiologist Cheryl Nickerson of Arizona State University in Tempe.
The
radiation used for cancer therapies is a much more targeted version of what exists in outer
space, and exposure to that
radiation presents a major health risk, and thus a serious challenge for NASA, SpaceX, and
other organizations trying to explore the solar system.
Lunar observations (and
other space - based observations) show that GCR
radiation doses are rising faster than previously thought.
But some regions may become redder and darker than
others because parts of the atmosphere collapse, exposing those spots to more surface - darkening
radiation from
space, researchers report March 22 at the Lunar and Planetary Science Conference in The Woodlands, Texas.
And one of the ways, one of the predictions of inflation, potentially, is if there is a background of something called gravitational waves — literally undulations in
space and time that exist throughout the universe — and two
other gentlemen that are here, John Carlstrom, he is one of the experimental leaders in looking at the cosmic microwave background
radiation, which is currently our best probe of the universe.
Look across
space from one edge of the visible universe to the
other, and you'll see that the microwave background
radiation filling the cosmos is at the same temperature everywhere.
Previously, all astronomy observations have relied on light — which includes X-rays, radio waves, and
other types of electromagnetic
radiation emanating from objects in
space — or on very - high - energy particles called neutrinos and cosmic rays.
Carbon dioxide, as well as CH4 and
other gases, absorb and re-emit longwave
radiation back to the earth's surface that would otherwise radiate rapidly into outer
space, thus warming the Earth.
Cosmic
radiation, another form of energetic ions in
space, is an important consideration in designing materials and advanced electronics used in satellites and
other space exploration technologies.
Exposure to
radiation (although considered minute), cramped
spaces, and potential infections (from
other passengers on the plane), and the stress of changing time zones (forcing your circadian hormone levels to adjust) can all add up to quite a stress, especially for frequent fliers.
Much of this
radiation is returned to the
space and the
other part is absorbed by the layer of gas surrounding atmosphere causing the greenhouse effect.
What
other things in the Earth system will change when it warms up that will affect how much SW
radiation is reflected back into
space [eg ice - albedo feedback, cloud changes] or affect what proportion of emitted LW
radiation is allowed to escape to
space [eg Water Vapour, cloud changes].
Theory certainly suggests that a warmer atmosphere as a result of higher CO2 concentrations will emit photons more frequently — and more of these will by chance find a path to
space restoring the conditional equilibrium between ingoing and outgoing
radiation — the condition being that all
other things remain equal.
Any extra warmth generated in the atmosphere by CO2 or any
other trace gas will quickly be neutralised by the hugely greater effect of the oceans in so far as it has not already been dispersed by increased
radiation to
space, evaporation, convection, condensation and rainfall.
Ultimately, only EM
radiation can export energy out of the earth atmosphere to
space (ignoring satellite launches, and
other minor massive ejecta for the nit pickers).
But most of the infra - red
radiation emitted by the earth's surface is absorbed in the atmosphere by water vapour, carbon dioxide, and
other naturally occurring «greenhouse gases», making it difficult for the surface to radiate energy directly to
space.
The atmosphere on the
other hand can cool only by IR
radiation to
space.
In
other words, no climate models, as of 2007, were accurate enough in their modeling of Earth's atmosphere to reflect, appropriately, how much solar
radiation was reflected back into
space and how much was trapped / absorbed.
The radiatively active gases (H2O, CO2) on the
other hand are like the holes (or opened windows) on a greenhouse, enabling the atmosphere to cool by
radiation to
space.
Much of this IR is at wavelengths at which
other atmospheric constituents do not interact, so if CO2 is exposed to a warmer surface like the earth, it will absorb
radiation that would otherwise pass through into the cold of
space AND likewise if CO2 is exposed to the cool of outer
space it will emit vast quantities of IR at wavelengths which
other gases can not emit.
If CO2 and H2O molecules now are cooled below the previous equilibrium point by having their
radiation allowed to escape to outer
space, then I believe these molecules must then tend to absorb more energy than yield energy with each interaction with the
other components of the atmosphere until that atmosphere as a whole reaches a new thermal equilibrium where the net
radiation going out and the net
radiation coming in (primarily from the sun and the surrounding atmosphere) is the same.
Heat conduction into
space occurs through two mechanisms: mass interactions (i.e. through atoms and molecules and
other particles) and
radiation (i.e., light).
Until or unless the planetary body is at the same temperature as deep
space there will always be energy input at the bottom of the atmospheric column (and a temperature gradient) and there will always be heat loss by
radiation (or some
other means like boiling off of the atmosphere) at the top of the column.
All absorbed
radiation must be returned to
space, except for very minor imbalances (e.g., of the order of currently estimated 0.9 W / ^ 2) during forcing by CO2, solar changes, aerosols, or
other climate drivers.
Somehow, largely by conduction, convection and latent heat, and such means
other than by
radiation, heat flows from the earth's surface to somewhere, where it is then radiated into
space.
«Radiative energy transport, on the
other hand, depends only on the difference of the local matter and
radiation temperatures at a single point in
space.
In February, the National Academies of Science released two major reports on geoengineering, one on carbon dioxide removal technologies (to draw down carbon dioxide from the atmosphere and hence reduce the greenhouse effect) and the
other on «albedo modification» or solar
radiation management technologies (to reflect a fraction of sunlight back to
space and thereby cool the planet).
About 30 percent of the
radiation striking Earth's atmosphere is immediately reflected back out to
space by clouds, ice, snow, sand and
other reflective surfaces, according to NASA.
Latent heat obviously can not escape directly to
space, it is first converted to simply heat by condensation and then to
radiation (by collisional excitation of CO2 and
other GHGs).
5) Thus the presence of water vapour and CO2 means that less energy is radiated into
space from within their characteristic
radiation bands so the temperature of the earth's surface has to increase in order for energy radiated at
other wavelengths to increase to compensate.
That goes for GHGs as much as it does for
other gases, which means that
radiation will gain more free access to
space above in close step with the decrease in opaque gas molecules.