Sunday, February 9, 2014
Monday, January 20, 2014
Thursday, January 2, 2014
Planetary Exploration...........Rewind 2013
Humans by nature are a curious lot. Always exploring, always setting a limit, crossing it and further setting a new limit. Space is a canvas for humans to sketch their ideas, play with technologies, overcome challenges and create wonderful mean machines capable of venturing astronomical distances where no human has ever gone! It comes with a lot of allied applications in defence, aeronautics, navigation, material sciences and even medical, apart from the enormous science!
Planetary exploration began in 1960s with Venera, Mariner, and Apollo missions (to Venus, Mars and Moon) which distinguished the exploration fraternity as those who are not satisfied being limited by the spatial extent of the Earth. Everyday newer discoveries are made and old bench marks are being shifted. Better resolution (spectrally and spatially) data are available. There is a need for better understanding the other known yet mysterious lands, distant and near and at the same time comprehending the analogous processes on the Earth. With so little been done and so much to do, these are exciting times!
Japan's AKASTUKI a.k.a Venus Climate Orbiter is bravely travelling as a recovery effort to study the harsh and hellish Venus (Venus arrival 2015). The curious CURIOSITY celebrated its first birthday of landing on Mars in August 2013. It investigates the geology finding larger answers of past Martian environment. It zaps the rocks through its laser eyes. It is well equipped with gas chromatograph, mass spectrometer, laser spectrometer (suite called Sample Analysis at Mars), X-ray diffraction and fluorescence (CheMin), Mars Hand Lens Imager, Alpha Particle X-ray Spectrometer, Mast Camera, ChemCam to vaporize fine thin layers from Martian surface and identify the excited atoms using spectrometer and not to forget the Radiation Assessment Detector. Curiosity is a true geologist. Apart from this, MAVEN (Mars Atmosphere and Volatile Evolution) launched in November, aims to investigate what went wrong with Mars-its lost atmosphere and water. It is devoted to study the upper atmosphere and the loss of atmospheric gases.
DAWN scanning one of the most interesting asteroid Vesta (a close-up like never before, its extreme terrain images released in an Atlas in 2013) and now on the way to the largest one Ceres. Studying these protoplanets DAWN would take us back in time, as it would throw some light on early solar system (the dawn of solar system), its evolution and processes. JUNO en route to unlock the Giant Jupiter's secrets (Jupiter arrival July 2016). It had a gravity assist Earth flyby in October 2013. JUNO aims to study in depth the atmosphere, its composition, clouds, and magnetosphere, magnetic field and auroras.
On July 19, 2013, in an event celebrated the world over, CASSINI went into Saturn's shadow and imaged the planet, its seven moons, inner rings and our home Earth, in the background. The image released was a mosaic of 1600 images and a stunner. Hope you did wave at Saturn that time! Cassini continues to provide intriguing information about the Saturn system since 2004. As we entered a new year 2014 on our Earth, Cassini had a Titan flyby at 1400 kilometres altitude on the 1st. The New Horizons spacecraft already crossed Uranus orbit and awaits to unravel long standing mysteries of the newer horizons of Pluto (Pluto arrival July 2015).
Coming closer to home, the nearest neighbour Moon too has visitors- NASA's LADEE (Lunar Atmosphere and Dust Environment Explorer) entered the Moon orbit around its equator on November 20th 2013, has begun to study the extremely thin atmospheric structure and composition along with the dust, through three main instruments- the Ultraviolet & Visible Light Spectrometer, Neutral Mass Spectrometer and Lunar Dust Experiment.
The Chinese CHANG'E 3 landed on the desolate magnificent Moon on December 14th and a little rover YUTU was deployed. YUTU carries a ground penetrating radar that aims to provide the structure below. The LRO (Lunar Reconnaissance Orbiter) already orbiting the Moon sent back a picture of the lander and rover on Christmas, to us Earthlings.
The icing on the cake not to be forgotten, is with India entering the elite club of a handful nations attempting inter planetary mission on 5th November. The PSLV shot like firework from Sriharikota shooting hopes sky high of all Indians. The Mars Orbiter Mission is eight months and 600 million kilometres away from the Red Planet. Other than the technological demonstration it aims for scientific objectives of exploration of Martian surface, morphology, mineralogy and methane gas.
With years to come, the challenges are plenty. To achieve what has never been attempted before, planet to planet!
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Image Credit:Olaf Frohn, 2012 |
Must see: http://www.nasa.gov/mission_pages/cassini/whycassini/jpl/cassini20131112.html#.UsWcmfQW1bY
*P.S: Past and present NASA planetary data archived and distributed via http://pds.nasa.gov/
Saturday, December 28, 2013
Memory Lane....Revisited
"Memory....is the diary that we all carry about with us"
-Oscar Wilde
Some roads, however difficult to travel
may have to be treaded not once, not twice but often.
As you travel along these paths,
you gather experiences,
lessons are learnt,
strangers are met,
mistakes are commited,
moments are cherished!
And soon you realize,
that the road once a strange land
is now full of memories!
And sooner enough, you tend to go back there more than 'often' can be!
-for the pleasant moments there bring back a smile,
and the harsh lessons make you braver!
And soon enough,
its a Memory Lane...Revisted!
Sunday, December 22, 2013
HIATUS
"We are likely to be disconcerted....by hiatuses of thought"
-Edmund Wilson
Hiatus-a break, a gap, an interruption, Pause or the unrepresented time. Geologically speaking, hiatus indicates a break or gap in the geologic record, a period of erosion or non deposition. When such hiatus is evident in stratigraphic sections, geologists call it an unconformity. The Earth's crust is changing continuously with upliftment, subsidence and erosional activities. The data preserved in the rocks or as rocks is not complete and continuous. It is much like a book, layer by layer represented by pages. However some pages are torn or missing! These are unconformities. No, they aren't insignificant. They provide you with enough details you need to unravel. They mark the junction where different rocks, formed at different geologic times, by varied forces exist and sometimes they are separated by millions (even billion) of years. We realize that human life span is not even a moment compared to the geologic time!
Here, Precambrian schists which have been tried and tested by heat, pressure over time, folded and faulted may be overlain by smooth and calm horizontal beds of Cambrian (Nonconformities separate igneous/metamorphics from overlying sedimentary strata). Here, the inclined beds may be overlain by horizontal beds (angular unconformity). Some times, both the sedimentary deposits may be horizontal and separated by an erosional surface (disconformity).
Types of Unconformities: http://earthsci.org/education/teacher/basicgeol/geotim/geotim.html |
James Hutton, often called as 'Father of Modern Geology' (a Scottish farmer and naturalist) and a revolutionary observer of geological sections, made an important observation at the Siccar Point, Scotland in 1788. The juxtaposition of almost vertical layers of gray shale and overlying horizontal layers of red sandstone is seen here. Hutton put forth that the gray shale were deposited, uplifted, tilted, eroded and subsequently covered by ocean, when again the red sandstone was deposited. The boundary between the two rock types at Siccar Point is now called the Hutton's Unconformity, a geological landmark.
Geological Society of America, http://www.gsahist.org/v35n03/11-poster.gif |
(Animations for unconformity formations
Moving away from the geology, we do need to take a break and slow down some times. Essentially, to channelise the thoughts, to erode away the negativities and let new opportunities deposit! A newer self! So, taking a hiatus, doesn't mean calling it a day! :) It means hitting back with a zeal! Happy Hiatus.
Thursday, October 24, 2013
Sun, Surf, Sand...
I have a special affinity to coasts for several reasons.
One being the tranquillity of the vast expanse of sea blue merging with
serenity of the endless sky blue. And then the quartzitic sand, calcareous
molluscs and gastropods and the sea breeze! Soaking in the Sun or playing with
the surf. Want to hit the beach; we would think of Goa or Kerala as the getaway
but close to home, Maharashtra is blessed with a wonderful coastline too! Right
from the wide northern beaches to urban coasts of Mumbai to rocky cliffs along
Murud to the white sandy beaches at Tarkali. From the mangroves of the estuaries to the few corals. From
overcrowded Juhu to virgin Sindhudurg stretches. A trip along the Maharashtra
coast is definitely worth every moment!
Other than the usual ‘tourist spots’, here are few ones not
to miss. Extreme north Maharashtra, the Thane region has some surprisingly
beautiful beaches especially around Nalasopara. It’s a perfect family picnic
spot with abundant shady Casuarina and wide sandy beach.
Time to be here: Sunset!
The extreme north Maharashtra coast is remarkably similar to
South Gujarat, nature suggesting that boundaries are manmade! We all know about
the Mumbai Chowpatis- the refuge for all Mumbaikars!
To munch on here: The Bhel Puri!
Furthur South, as you head towards Alibag, the road is good
enough with fine eateries and dhabas on the way! The Alibag town itself doesn’t
have a very pleasing coast but its neighbouring Kashid, Akshi and Revdanda make
up for it. The Portugese Revdanda fort ruins run along the seashore and the
waves lashing this fortification with palms fringes in setting offer a treat to
the eyes.
When not to be here: At the high tide!
As you continue your journey to Murud, the roads have started
winding by now. The Deccan basalts make their presence felt, sandwiching crescent sandy patches between its cliffs. You
realise why ‘pocket’ beaches are called so. The drive here is thoroughly enjoyable as the
road runs parallel to the cliffy coast.
It’s not just another fort; it stands tall and undefeated in
the Arabian Sea. Sadly, these ruins are in bad shape and uncared for. Spare
time here a couple of hours, as a ferry carries you from Rajapuri to the fort.
Head to Shrivardhan from here to be awed by wider beaches here (Diveagar and
Harihareshwar too can be considered). It’s a quiet seaside town but has some of
the extremely cosy and hospitable cottage stay right in the ‘wadis’.
What to do here: walk around the wadis early morning!
And if you have thought so far you have visited the best
places, then gear up, recharge your batteries and move on! Comparatively not so
good roads, and fewer roadside eatery options, be ready for some ferry rides
across the rivers. You can take a ferry ride (along with your cars/bikes) to
Velas.
Dapoli (Anjarle, Harnai) is worth the time. On the way south you will
come across Enron around Dabhol. Time for another ferry ride. And before you
reach Ratnagiri, Guhagar is the place to be and take some blessings from the
favourite God at Ganapatipule! Just outside the hustle bustle of Ratnagiri
there is a quiet beach Mirya, a good one to end the long day.
Not to forget: Ratnagiri Haapoos (if you travelling in summer). Hope you aren’t yet tired. The best is yet to come I assure!
The blue waters of Achra are intoxicating! This hue of the
Arabian Sea continues throughout the Sindhudurg coast.
Malvan is a foodie’s
paradise. And Tarkarli a sand castle builder’s! The sparkling white sand is marvellous.
The water sports lovers; Malvan is the place for you with its Scuba diving,
Snorkeling, kayaks, banana rides, jet-ski.
Must visit: the Sindhudurg fort (this also brings back a lot
of fuschite quartzite memories)
Again, spare a couple of hours for the 17th
century fort (Kurte island). The view from the top is breathtaking and the
history of the fort intriguing. Majestic gates, fresh water reservoir, coconut
tree with branch, temples, to keep you engrossed inside.
Before you decide to end this expedition spend a couple of
days at uncluttered Vengurla-Shiroda-Velagar with its pristine silver sands and
cool sea breeze.
Maharashtra’s affair with the Arabian Sea ends and Goa’s
begins! It is time to pull back inland to home.
And the last thing to know: Go unplanned and be ready for surprises!
* Don’t be disheartened with the roads. Think about the
surf, sand and sun you are going to be offered!
* Transportation best by ferries wherever possible.
* Many more places worth visiting are not mentioned. Due for
next trip :)
Friday, October 11, 2013
Favourite of favourites
Some times it’s difficult to say which one is a better
season. The monsoon which transforms the landscape with its magic wand or the
wonderful winter that comes with long nights and clear skies (Nevertheless,
there is immense joy in both these which cannot be ignored)! So gearing up for welcoming the winter (read clear skies) is
a long awaited sensation after the one third year of rains! The favourite of
the favourites become tricky to sort.
The rising of Moon over the building,
The tracing of constellation lines in imagination and
weaving stories,
The winter chill making the telescope tube cold,
or the hot mug-o-chino under the dark sky!
The sight of the Milky Way,
or running up the terrace to watch Venus even as the Sun is
setting
Pondering about which phase of the Moon is the most beautiful,
or is it the Moon itself?
Simply lying down and counting the meteors
Or false alarm planes.
Sleeping the whole day
to be awake the entire night!
Finding the Pole star the Big Dipper way
Not
missing out the happy duo Mizar-Alcor.
Wishing the telescope turning into a huge Hubble-like-thing
and site into Class 1 Bortle!
Waiting for the Bull, the Lion and the Scorpio,
the blue giant and
red super giant!
Trying to imagine where a star would be in the
Hertzsprung-Russel,
Or knowing that the planet in opposition is there to
accompany you through the cold hours.
The Messiers and much more!
Loving the silent stillness of the night,
Yet knowing that seemingly insignificant points are reciting
their evolution aloud!
The sound of the night-These are a few of my favourite
things!
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