Google celebrates Grace Hopper’s 107th birthday with google doodle.
from the programme Have I Got News For You
This colorful view from NASA’s Cassini mission is the highest-resolution view of the unique six-sided jet stream at Saturn’s north pole known as “the hexagon”. This movie, made from images obtained by Cassini’s imaging cameras, is the first to show the hexagon in color filters, and the first movie to show a complete view from the north pole down to about 70 degrees north latitude.
Credit: NASA/JPL-Caltech/SSI/Hampton University
The transit light curve gives an astronomer a wealth of information about the transiting planet as well as the star. It is only for transiting exoplanets that astronomers have been able to get direct estimates of the exoplanet mass and radius. With these parameters at hand astronomers are able to set the most fundamental constraints on models which reveal the physical nature of the exoplanet, such as its average density and surface gravity. As mentioned above the transit events do not just give information about the exoplanet, but quite often also information about the star. With telescopes capable of high precision photometry, transit curve anomalies can say something about the activity of the star. An example of this is when an exoplanet crosses star spots (Fig. 2) [source]. This can be seen in the light curve as a small increase in flux due to the light of a cooler part of the star being blocked out.
With a very high precision light curve with a high Signal to Noise (S/N), the light curve can also be used to infer the presence of other planets in the system. Perturbations in the timing of exoplanet transits may be used to infer the presence of satellites or additional planetary companions [source,source].
Credit: Paul Anthony Wilson
I have to say, in reality, they’re definitely not as pronouced as the gif implies, nowhere near it.
R.I.P Nelson Mandela
Maybe in another 50 years, children won’t believe that a man such like this had also walked upon this earth.
Q: Larry, does the President have any reaction to the announcement—the Centers for Disease Control in Atlanta, that AIDS is now an epidemic and have over 600 cases?
MR. SPEAKES: What’s AIDS?
Q: Over a third of them have died. It’s known as “gay plague.” (Laughter.) No, it is. I mean it’s a pretty serious thing that one in every three people that get this have died. And I wondered if the President is aware of it?
MR. SPEAKES: I don’t have it. Do you? (Laughter.)
Q: No, I don’t.
MR. SPEAKES: You didn’t answer my question.
Q: Well, I just wondered, does the President—
MR. SPEAKES: How do you know? (Laughter.)
Q: In other words, the White House looks on this as a great joke?
MR. SPEAKES: No, I don’t know anything about it, Lester.
Ten more awful laughs from the ’80s at BuzzFeed.
World AIDS Day, December 1st
World AIDS Day, observed on 1 December every year, is dedicated to raising awareness of the AIDS pandemic caused by the spread of HIV infection. Government and health officials observe the day, often with speeches or forums on the AIDS topics.
Screenshots from Interactive World AIDS Day 2013 Infographic by CNN
Source: UK’s National AIDS Trust, WHO, UNAIDS, amfAR, CDC
EDITORIAL: BRYONY JONES
GRAPHIC: CNNI DESIGN & DEVELOPMENT
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Any Human Heart.