The Green Flash
"Given a clear path to the horizon — such as over the ocean — this means that there’s a slight region of space just above the reddened Sun where only the shorter wavelength light is visible!
And when that happens, in addition to the normal color gradient that comes with a sunset, you can also get a small, separate region above the disk of the Sun that appears yellow, green, or even blue! (And much fainter than the rest of the Sun!)”
During sunset, the Sun appears to redden, dim, and eventually sink below the horizon. Every once in a while, a rare phenomenon emerges along with it: a green flash, where a greenish-colored beam of light appears just over the Sun. What causes it? One of the most beautiful natural phenomena our planet has to offer, explained in glorious detail.
Debunking The Largest Void in The Universe
Discovered in 2007, this is the largest known void in the universe. More info: http://bit.ly/17CJxaA
Decided to give this reply its own post since I saw people taking off what I said about this pic:
This is extremely false and misleading. If I’m not mistaken (please correct me if I’m wrong), this is actually Barnard 68. B68 is a dark nebula:
"Barnard 68 is a molecular cloud, dark absorption nebula or Bok globule, towards the southern constellation Ophiuchus and well within our own galaxy at a distance of about 500 light-years, so close that not a single star can be seen between it and the Sun. American astronomer Edward Emerson Barnard added this nebula to his catalog of dark nebulae in 1919. He published his catalog in 1927, at which stage it included some 350 objects. Because of its opacity, its interior is extremely cold, its temperature being about 16 K (−257 °C). Its mass is about twice that of the Sun and it measures about half a light-year across." [source]
It’s actually a blob of dust gravitationally collapsing in on its own mass to eventually become a star in like 100,000 years.
This is simply a photoshopped version, whoever did this must have used the liquify tool to give the nebula’s figure a slightly different shape. But what caught my attention aside from that suspicious description about being “completely empty of normal matter and dark matter” was the fact that I remember what the brighter stars surrounding B68 look like.
This is B68:
See how similar it looks? down to the position of the closer stars most visible? The above pic is a sham :/ I love the mysteries of the Universe as much as the next person but there’s really no point in misleading stuff like this. Oh and p.s. the link provided above in the original post is a completely different article talking about a completely different occurrence unrelated to the provided image of B68.
It’s all about the particles in the tattoo ink’s pigment says Dr. Anne Laumann, MBChB, a professor of dermatology at Northwestern University.
Tattoo application uses a mechanized needle to puncture the skin and inject ink into the dermis or second layer of skin just below the epidermis. Since the process involves damaging the skin, the body responds with white blood cells which attempt to absorb the foreign particles and dispose of them in the blood stream.
“The reason pigment stays there is because the pigment particles are too big to be eaten by the white cells, so they just sit there,” Laumann says.
Tattoos have become increasingly popular in recent years. According to a 2010 Pew Research Report, approximately 40 percent of Americans between the ages of 18 and 29 have at least one tattoo.
The problem with tattoos is exactly what makes them so appealing—their permanency. “If you have the name of your boyfriend on there and then you marry somebody else, that’s a problem,” Laumann says.
Tattoos also tend to become problematic with age. Ink can become blurred if injected too deeply into the skin, causing the pigment to migrate beyond the intended area. Fading and distortion due to changes in body shape are also common problems with tattoos. Permanent makeup—or tattoos that resemble eyeliner or other makeup—is a prime example of how these problems can lead to dissatisfaction years after the ink is applied because skin sags and changes shape with age.
“The problem with that is as you get older the shape of the fold of the skin changes,” Laumann says. “So not only does it bleed a bit because the pigment moves gradually over time and so those will tend to become sort of smoky edges, but also the whole line might become a little distorted over the years.”
When a tattoo is no longer desirable, whether it’s faded or causing a bad case of buyer’s regret, you can burn it or cut it out—but the safest and most effective method is a laser treatment.
She used to love me with a love that wouldn’t die
Looking at her now I can’t believe I said good-bye
It would only take a minute to turn back the clock
She used to love me a lot