Cash Advance Loans Cash Advance Loans

Tag: Science

Solar Cycle And Dancing Lights- Aurora 2013

As described in my earlier posts, our local star Sun, undergoes a natural cycle of roughly 11 years and  it’s peak activity it is manifested by increase in number of solar spots, coronal mass ejections (CME), enormous magnetic waves.  CMEs when they travel to earth are then directed by earth’s magnetic fields towards earths poles which leads to display of beautiful Aurora or dancing lights. Auroras are result of the interaction between ions and electrons from the solar wind with Earth’s magnetic field and upper atmosphere. During Coronal Mass Ejections from the sun, high energetic ions are bombarded towards the earth. These ions migrate towards poles due to Earth’s magnetic fields, that’s why this phenomenon is seen mostly at Northern and Southern poles of the earth. These high energetic ions interact with Oxygen and Nitrogen of the upper atmosphere and excite them to higher energy levels. When the atoms fallback to ground state it emits light typical to particular atom. Oxygen emits at a wavelength of 558 nm (green) and at 630 nm (red ). Emission at 558 nm is more prominent and that’s how Aurora gets it’s greenish color. A slight tinge of red color can also be seen at times.  Auroras in other colors have also been seen such as blue and purple but green ones are most prominent. Here is a beautiful timelapse video captured by Christian Mülhauser in Norway during Feb 2013.

2013 is supposed to be solar maxima but unfortunately, our Sun has been low in activity and has defied many predictions, probably the weakest in more than a century. Solar activity is also measured by the number of solar spots observed and this time maximum solar spots observed has been 67 (observed in Feb 2011) and since then it has been low and it appears that it will slowing down now onwards. As compared to this cycle, more than ~150 sun spots (2003) were observed in last solar cycle.

A lull in solar activity means reduced Aurora display on earth which is sad. Although last week there was a short burst of activity which resulted on some Aurora display and was captured by Astro Photographer Göran Strand in Sweden on Oct 2nd, 2013. Enjoy the videos by  Göran Strand and Christian Mülhauser and hopefully solar activity picks up!

Soruces:  http://solarscience.msfc.nasa.gov/predict.shtml

http://www.astrofotografen.se/

https://vimeo.com/62534688

Leave a Comment October 8, 2013

First LIBS Spectra From Mars!

Publishing a post after long long time, busy times! But couldn’t resist posting first LIBS (Laser Induced Breakdown Spectroscopy) Spectra from Mars! It is interesting to see Hydrogen lines at 656 nm (possibly from ice on Mars or water condensation from Mars atmosphere). Carbon line adjacent to it is doubtful and needs further analysis. I can try to write more details about it later when I get time. If anyone is interested how LIBS plasma looks in Mars environment as compared to earth, you can see it here.

Leave a Comment August 24, 2012

# IAmScience

“Magical things can happen when you enthusiastically open your mouth on the internet.” – Kevin Zelnio

Science writer and marine biologist Kevin Zelnio started the Twitter hashtag #IamScience last month, encouraging scientists to share their individual stories about their traditional or unconventional paths that brought them to where they are today. The response was overwhelming, with hundreds of tweets pouring in over just a few days.Mindy Weisberger compiled some of the tweets and added Reckless Kelly’s “Wicked Twisted Road” to create this video. If readers of this post can share their thoughts about how they got into their profession including science that would be great.

Leave a Comment February 12, 2012

Weekend Video: VDay Special- Look Into Her Pupils


Pupils? Did I mean Look into her eyes? Well the title of this post is correct. According to Bruno Laeng, Pupillometry expert from University of Oslo, we need to look closer and deeper into the pupils of individuals in order to gauge their emotional responses. Pupillometry is basically the measurement of diameter of eye’s pupils. It has been shown during past 50 years of pupillomtery that pupils respond not only to changes in light from surroundings but also to other stimuli including thoughts, emotions and mental loading. Typically, in response to strong emotions or heavy mental loading, pupils dilate which indicates increase in attention of the individual. In other words, if pupils of your loved one increase listening to your Vday proposal, its indication that she has got your attention and that’s a good sign!

Video credit: Science Friday podcast

Pupillomtery article:  Pupillometry A Window to the Preconscious? Laeng et al. | doi: 10.1177/1745691611427305 Perspectives on Psychological Science January 2012 vol. 7 no. 1 18-27

Leave a Comment February 11, 2012

Aurora 2012

While my blog was in hibernation, there was massive solar activity going on which resulted in some spectacular Aurora display on earth. Here is one breathtaking video captured by Christian Mulhauser in Norway during the week of Jan 24. Enjoy the video!

Leave a Comment February 11, 2012

Science is Scamming and Confusing America, How?

Last night’s The Daily Show was awesome as always. Take a look at the video and here is a word of caution: don’t let any scientist con you into believing in evolution or global warming or vaccination or any other “science junk”.

Leave a Comment October 27, 2011

Symphony of Science: The Quantum World

Enjoy the symphony of quantum world featuring Morgan Freeman, Stephen Hawking, Michio Kaku, Brian Cox, Richard Feynman, and Frank Close.

Video credit: http://symphonyofscience.com

Leave a Comment September 7, 2011

Motion And Phases of Moon

While people are enjoying today one of the longest lasting lunar eclipse since 2000 (about 100 minutes long), let’s watch this beautiful video created by folks at NASA Goddard Space Flight Center (see below) using data collected by Lunar Orbiter Laser Altimeter (LOLA) aboard the Lunar Reconnaissance Orbiter (LRO). In the video you can see various phases and movement of moon during the course of one year; one month of movement has been compressed into 12 seconds. As we know, we are able to see only one face of the moon from earth (moon and earth are phase-locked– rotation time of moon is same as it’s revolution time around the earth- about 27 days), in the video it is clearly evident that only one side is visible to us. Since we get to see the moon from different angles owing to it’s tilt and elliptical shape of the orbit, in the video it appears to us as if moon is wobbling. In technical terms we call that wobbling as “liberation”. Because of liberation, we are able to see little bit more than half of the moon’s surface, close to 60%. Due to elliptical orbit, moon also appears to rock back and forth from us (perigee- nearest position, apogee- farthest position). You can also observe different phases of moon such as new moon and full moon and their variations in different months. Enjoy the video, I will be uploading some cool videos or pictures from today’s lunar eclipse event later on.


Video/Image credit: NASA/Goddard Space Flight Center Scientific Visualization Studio

Leave a Comment June 15, 2011

Previous page


Subscribe




Video of the Day

Categories

Archives

Recent Posts

My Links

Pages

Google News
U.S. : Top News

RSS CNN IBN News

Tag Cloud

Music Video of The Day

RSS TED Talks

Born on this day

December 13, 2019
1925 Dick Van Dyke
1929 Christopher Plummer
1948 Ted Nugent
1949 Randy Owen
1949 Paula Wilcox
1949 Robert Lindsay
1952 John Francombe
1953 Jim Davidson
1957 Steve Buscemi
Joe's