Is there radiation in outer space?
The radiation environment of deep space is different from that on the Earth's surface or in low Earth orbit, due to the much larger flux of high-energy galactic cosmic rays (GCRs), along with radiation from solar proton events (SPEs) and the radiation belts.
The astronauts also gathered samples and returned to Earth with over 600 pounds of Moon rocks and dust. Since 1972, no human has returned to the Moon. The table below shows the amount of time astronauts spent on the surface of the Moon during each lunar landing, and the average radiation dose they received.
- The scientific unit of measurement for whole body radiation dose, called "effective dose," is the millisievert (mSv). Other radiation dose measurement units include rad, rem, roentgen, sievert, and gray. Doctors use "effective dose" when they talk about the risk of radiation to the entire body.
- This freebie is a cheat sheet to help teachers analyze student errors on running records. Determine if students are using meaning, syntax, or visual cues while reading. Check out my blog post about how to analyze MSV! Teachers who liked this also bought: Nonfiction Text Features.
- ?A Running Record is an assessment tool which provides an insight into a student's reading as it is happening (Clay, 1993). A Running Record provides information on the following: a score of word reading accuracy. an analysis of a reader's errors and self-corrections. an analysis of the reading strategies used.
Astronauts are exposed to approximately 50-2,000 millisieverts (mSv) while on six-month-duration missions to the International Space Station (ISS), the moon and beyond. The risk of cancer caused by ionizing radiation is well documented at radiation doses beginning at 50 mSv and above.
- Below are some tips about making sure your home WiFi network is as safe as it can be: If your home WiFi network is not encrypted, encrypt it immediately. And if your WiFi router is using WEP, change it to WPA/WPA2. All WiFi routers support some kind of encryption, which scrambles information you sent over the Internet.
- Smart Meters Might Disrupt WiFi. A blogger at Smart Data Collective says electric smart meters rolled out by utilities may cause interference with WiFi. A Zigbee device within each smart meter sends a ping about every 30 seconds to communicate with other smart meters in the vicinity, creating a mesh network.
- Biological effects can result from exposure to RF energy. It has been known for many years that exposure to very high levels of RF radiation can be harmful due to the ability of RF energy to heat biological tissue rapidly. This is the principle by which microwave ovens cook food.
Where does radiation come from in space? There are three naturally occurring sources of space radiation: trapped radiation, galactic cosmic radiation (GCR), and solar particle events (SPE).
- Solar energetic particles (SEPs) and galactic cosmic rays (GCRs) turn a trip to Mars into a six-month radiation shower. The Mars rover Curiosity has allowed us to finally calculate an average dose over the 180-day journey. It is approximately 300 mSv, the equivalent of 24 CAT scans.
- The ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (UVR) from the sun, protecting life on Earth from its potentially harmful effects. When the sky is clear, there is an inverse relationship between stratospheric ozone and solar UVR measured at the Earth's surface.
- Space radiation is made up of three kinds of radiation: particles trapped in the Earth's magnetic field; particles shot into space during solar flares (solar particle events); and galactic cosmic rays, which are high-energy protons and heavy ions from outside our solar system.
Updated: 26th November 2019