Sunlight has UV photons that we humans can’t see but can damage our skin. There are UVB rays and UVA rays, UVB rays are short wavelengths and don’t get deep into our skin so they are the main cause of sunburn + skin cancer but UVA rays have a longer wavelength and go deep into the skin and are the cause of early aging. (1) The Sun can Harm us because the sun emits dangerous UV rays, luckily the ozone layer absorbs most of these UV rays but the ones that do get to the surface can be dangerous to our skin and can cause Sunburn and ,in worse cases , Skin cancer. SunBurn is reddening,swelling of the skin and can cause blistering and peeling of the skin, when you spend a long time outside on a sunny day and you are exposed to UV rays our
The large star that we call the Sun can be very helpful by providing us with vitamin D which enlightens our mood and keeps us optimists. Although in some cases sunlight exposure, especially too much of it can be very harmful to our health and skin. There are many different irritations that can be caused from too much sunlight, one of the most popular and common is sunburn. There was a survey and over one third of adults and up to 70% children had said that they have had sunburn in the past year (according to the cdc) 1. Sunburn is when your skin reddens, maybe swells up and sometimes even the blistering or peeling of the skin.
UV radiation is a form of energy from natural and artificial sunlight. Excess amounts can cause damage to DNA in the skin. Although some argue tanning is good for you because it helps form a “base tan” and the UV exposure time is controlled. The truth is, each time you lay in a tanning bed, it increases the risk of developing skin cancer
When the temperature finally exceed 10 million K, thermonuclear fusion would happen. The great energy released by this nuclear fusion would make the star shine brightly and now become a “real” star. We would call these type of stars “main sequence”. Low mass stars (about a half masses of our Sun) are the smallest, coolest and dimmest stars in the Main Sequence. They are usually in red or brown colors.
Also, there's a limit of protection that melanin can provide and that limit is higher in people with darker skin. The problem with someone's skin "getting darker" is there can be some damage that is being done. Some of the damaging effects of UV radiation is it can damage you're DNA, it can promote burns, and most commonly it promotes skin cancer. There are pros and cons about your skin getting darker, but I'd say it's safe to say wearing sunblock is always a good thing. My skin is darker because the melanocytes in the basale layer of epidermis are producing melanin to try to protect me from the harmful UV rays of the sun.
We need UV light to produce vitamin D. But extended amount of exposure may cause some health problems. Only a small layer of ozone is standing between the harmful UV rays and us. The ozone layer absorbs the light rays, which causes a reaction to occur. This reaction is the reason why the ozone has three oxygen atoms. But still %3 or less amount of radiation can pass through the layer, which can cause sunburns and skin
UV radiation is one of the most damaging factors that influences the health of the skin. It is more important in people than animals, however, due to their lack of furry covering and thus greater skin to sunlight exposure. Still, some animals with light pigmentation, thin fur, areas of bare skin or albinos will be at risk. Clinical studies have identified excessive sun exposure (and thus exposure to solar ultraviolet radiation) as a primary causative factor in various skin diseases including, premature ageing, inflammatory conditions, malignant and non-malignant tumours (Chang 2010; Schmitt 2011). This is due to a series of harmful biochemical reactions occurring in a process known as photoaging.
The mass of a Star determined the Star's development and time of death. The most of the Star's have age from one billion to ten billion years.The Solar System has a planet where there is a life. The Solar System locates in the Milky Way and the Solar System has 26,000 light years from the center of the Milky Way. The Solar System has known to be life a unique planet. This planet is the Earth.
Bright stars fill the Milky Way galaxy with beauty. Many solar systems revolve around the galaxy. The Milky Way is the galaxy we live in. Even though many people only know the Milky Way as the galaxy we live in, there is actually a lot more to it than you may think. 1.
The changing of UV irradiance can affect primary production in all ecosystems, terrestrial and aquatic, natural, managed, or exploited with a potential cascade of effects. Current understanding of these processes does not enable confident prediction of the impacts. Chapin, Sala & Huber-Sannwald (Scenario 2013) pointed that “little is known about the effects of increasing UV-B on either biodiversity or ecosystem function”. It is necessary to consider as positive as negative impact of UV radiation on living organisms and