Monday, August 15, 2016

World's Largest Telescope Unlikely to Find Home in India


The telescope is part of an ambitious international project to discover more about our universe.
One of the potential alternate sites for the Thirty Meter Telescope (TMT), proposed for the Indian town of Hanle, has less advantageous characteristics than other places Indian Minister of State for Science and Technology Y. S. Chowdary said before parliament.
"Hanle site has lower seeing values of 0.9-1.2 arc sec as compared to the alternate sites in Chile and Canary Islands of Spain (La Palma) which have seeing values of 0.55 arc sec.
Thus, scientifically, Hanle has less advantageous characteristics for hosting a mega telescope like the TMT in comparison to the other alternate sites."
Indian participation in the TMT project is being jointly funded and overseen by the Department of Science and Technology (DST) and the Department of Atomic Energy (DAE). TMT was originally set to be installed at Mauna Kea in Hawaii, the US.
The construction work for TMT at Mauna Kea was started but had to be stalled due to revocation of a permit by orders of the Supreme Court of Hawaii.

Saturday, June 25, 2016

Isaac Asimov's Guide to Earth and Space by Isaac Asimov (Rating *****)

How do we know that stars are millions of miles away? How was the moon formed? Is there life on planets that circle other stars? What is a nova? What are black holes?

You will find the answers in this book, and not in long, mind-numbing technicalities. Isaac Asimov’s unique skill and authority have never been better deployed than in this fantastic grand tour of the cosmos. Over the course of this brilliant expedition, the reader will experience close encounters with giant planets, unusual views of pulsating stars, and rendezvous with distant galaxies, as well as the unfolding history of astronomical discovery, beginning with Eratosthenes (who calculated the size of the Earth in 240 B.C.) and ending with the stunning scientific achievements of the present day. In no other book can the intelligent layman get so keen and thorough a summary of the riddles of Earth and space. Asimov deftly reveals the secrets of the universe with explanations that anyone from novice to scholar can understand and enjoy.

Puzzles by pulsars? Terrified by black holes? Bewildered by the big bang? Here are succinct, crystal-clear answers to more than one hundred of the most significant questions about planets, stars, galaxies, and the essential nature of the universe that have occupied astronomers since the beginning of history. For anyone who has ever looked up at the stars and wondered what it all means, Isaac Asimov’s Guide to Earth and Space is indispensible.

This is a series of 111 short, one- or two-page essays answering simple questions starting with the shape of the Earth and ending with the fate of the Universe. In this it rather resembles the earlier Please Explain. Here, however, since the book was written as a piece and not as a collection, the questions interact and each is related to the questions on either side, so there is a sense of gradually being drawn along. It’s a nice enough book—not world-shaking, but nice.

One of science's most prolific writers produced this question-and-answer book about this planet and astronomy. Although the book is heavy on historical treatment, the science facts are generally up to date. For the novice, the book is best approached in a linear fashion, going through the questions in order, since some answers depend upon previous ones. Other readers may prefer to locate items of interest through the table of contents or the index. The illustrations are disappointing, serving only to accent the page layout. Recommended for general readers at an introductory level; of less value to an academic library.

Wednesday, June 22, 2016

India launches 20 satellites in single mission

India successfully launched a rocket carrying 20 satellites on Wednesday, setting a new national record as its famously frugal space agency looks to grab a larger slice of the lucrative commercial space market.

The rocket blasted off from the southern spaceport of Sriharikota carrying satellites from the US, Germany, Canada and Indonesia, the most in a single Indian mission.

Most of the satellites are intended to observe and measure the Earth's atmosphere, while another aims to provide services for amateur radio operators.

"Each of these small objects that you are putting into space will carry out their own activity, which is independent of the other, and each of them will live a wonderful life for a finite period," Indian Space Research Organisation (ISRO) chairman A.S Kiran Kumar told the NDTV news network.

The business of putting commercial satellites into space for a fee is growing as phone, Internet and other companies as well as countries seek greater and more high-tech communications.
India is competing with other international players for a greater share of that launch market, and is known for its low-cost space programme.

Among the 20 satellites launched on Wednesday were 13 from the US including one from a Google-owned company and two from Indian universities.

- 'Market potential' -

Prime Minister Narendra Modi said the launch was a "monumental accomplishment", although it trails Russia's 33 record launched in 2014 and NASA's haul of 29 the year before.

"Our space programme has time and again shown the transformative potential of science & technology in people's lives," Modi tweeted.

Expert Ajay Lele said the latest test was a "quantum jump" for India which has "made its presence felt even more now by displaying its promising market potential".

"India is attracting key foreign players, most importantly the US, in the space market thanks to its cost-effectiveness and credibility," said Lele, a senior fellow at the New Delhi-based Institute for Defence Studies and Analyses.

Lele said he expected ISRO to form a public-private partnership to outsource its growing commercial activity in another three to four years.

Last month India successfully launched its first mini space shuttle as it joined the global race to make reusable rockets.

In 2013 India sent an unmanned rocket to orbit Mars at a cost of just $73 million compared with NASA's Maven Mars mission which had a $671 million price tag.

The successful mission was a source of immense pride in India, which beat rival China in becoming the first Asian country to reach the Red Planet.

Modi has often hailed India's budget space technology, quipping in 2014 that a rocket that launched four foreign satellites into orbit had cost less to make than Hollywood film "Gravity".

Monday, May 23, 2016

India's mini space shuttle blasts off


India successfully launched its first model space shuttle on Monday, a top official said, as New Delhi joined the race to develop a reusable rocket to make space travel easier and cheaper.

The winged shuttle blasted off on a rocket from the southeastern spaceport of Sriharikota at about 7:00am (0130 GMT), with television footage showing it streaming through a clear sky.

The shuttle, about one sixth the size of a normal one, was meant to reach an altitude of 70 kilometres (43 miles) before gliding back down and splashing into the Bay of Bengal 10 minutes later.
"The lift-off was at 7am from the first launch pad here," India's space chief Devi Prasad Karnik told AFP.

"We have successfully accomplished the RLV mission as a technology demonstrator," he said.
The Indian Space Research Organisation (ISRO), known for its low costs, has developed the winged shuttle called the Reusable Launch Vehicle or RLV-TD reportedly on a miniscule budget of one billion rupees ($14 million).

Monday's test mission was a crucial step towards eventually developing a full-scale, reusable shuttle to send up satellites in the future.

India faces stiff competition including from global companies which are developing their own reusable rockets after NASA retired its space shuttle programme in 2011.

Reusable rockets would cut costs and waste in the space industry, which currently loses millions of dollars in jettisoned machinery after each launch.

Billionaire Elon Musk's SpaceX and Amazon owner Jeff Bezos's Blue Origin have already successfully undertaken their own test launches.

But ISRO hopes to develop its own frugal shuttle, as it seeks to cash in on a huge and lucrative demand from other countries to send up their satellites.

ISRO made global headlines in 2013 after it successfully launched an unmanned mission to orbit Mars, spending just $73 million. NASA had spent $671 million on its Maven Mars mission.

Monday, January 18, 2016

The Demon Haunted World By Carl Sagan (Rating ***)

The Demon-Haunted World is a collection of twenty-five essays, several written with Sagan's wife, Ann Druyan. The essays range in scope from eloquent paeans to science to impassioned denunciations of bigotry, from humorous accounts of a variety of pseudoscientific endeavors to serious attempts to understand the nature of alien abduction delusions. With intelligence and wit, and the rational calmness that is his trademark, Sagan takes on a wide variety of topics, among them: alien abductions, astrology, Atlantis, the Bell Curve, channeling, crop circles, demons, electromagnetism, ESP, the face on Mars, fairies, faith healing, magic, miracles, prayer, religion, Roswell, satanic rituals, therapy, and, of course, one of his favorite topics, UFOs and extraterrestrials. Only Velikovsky gets ignored this time around. Through each of his essays he extols the virtues of skepticism, empirical evidence and control studies, while uncovering a multitude of errors and weaknesses in the positions of occultists, paranormalists, supernaturalists and pseudoscientists. And he does so with extreme grace, gentility and civility.

In fact, if there is anything I disagree with in Sagan's book it is probably his encouragement of skeptics to be as civil as he is in dealing with what skeptics see as the dark that extinguishes the candle. He writes

    "...the chief deficiency I see in the skeptical movement is in its polarization: US vs. Them--the sense that we have a monopoly on the truth; that those other people who believe in all these stupid doctrines are morons; that if you're sensible, you'll listen to us; and if not, you're beyond redemption. This is unconstructive....whereas a compassionate approach that from the beginning acknowledges the human roots of pseudoscience and superstition might be much more widely accepted."

    "If we understand this, then of course we feel the uncertainty and pain of the abductees, or those who dare not leave home without consulting their horoscopes....such compassion for kindred spirits in a common quest also works to make science and the scientific method less off-putting, especially to the young."

    "Many pseudoscientific and New Age belief systems emerge out of dissatisfaction with conventional values and perspectives--and are therefore themselves a kind of skepticism."

I can't deny that there is a strong appeal in this call for compassion, for seeing the occultists of the world as after the same thing skeptics are after, and for recognizing the skepticism in those who adhere to pseudoscientific or New Age spiritual notions. If the goal were to try to get the true believer to give up his or her beliefs, then I would agree that an aggressive campaign which arrogantly maintains that it is better to live according to evidence than according to wishes might not be the best tactic. But, the aggressive, blunt, seemingly arrogant approach might be best if the goal is not to convert true believers to skepticism but to provide ideas which will counterbalance the plethora of occult, pseudoscientific, supernatural and paranormal notions which pervade just about any atmosphere in America, or the world, for that matter.

These aggressive methods may be the best ones if the goal is not to help persons who have been encouraged by therapists to think they've been experimented on by aliens, but rather to deter present and future therapists from encouraging patients to accept such beliefs as true and from using hypnosis to recover repressed memories. Such methods can evoke false memories of terrible things which probably never occurred. There is little to be gained, I think, in being compassionate with therapists who have no regard for truth and who encourage their patients to remember childhood abuses regardless of whether the abuses happened or not. Therapists who care for the truth are more likely to get aroused and make some effort to halt the abuses of their colleagues if we make a loud enough noise. And perhaps a future patient of one of these abusive therapists will have heard our angry voices and remember what we've said and question the therapist's methods.

Blunt and direct methods may be called for if the goal is not to persuade someone to give up astrology, crystals or tarot cards, but rather is to try to prevent someone in the future from seriously considering such things as reasonable guides to life.

I agree that it is unconstructive to be dogmatic, to call other people 'morons' or their ideas 'stupid.' I also agree that compassion is the appropriate response for people who have been duped by deluded therapists into believing incredible and harmful things. But I don't think it is the appropriate response to the therapists. We should go after them, and go after them aggressively with the bluntest instruments our language can muster. Likewise for the purveyors of pseudoscientific and New Age rubbish. To the L. Ron Hubbards, Helen Schucmans, Aleister Crowleys, John Macks, Budd Hopkins and Wade Quattlebaums of the world I say show no mercy!

Although some skeptics may take issue with Sagan's genteel style and grandpaternal tone, none of us will find fault with his skilful and recurring emphasis on critical thinking. The more blunt and vulgar among us refer to the need for a crap detector; Sagan provides instruction for building one's "baloney detection kit." He covers several common fallacies and ways to avoid them. He emphasizes the need for skepticism in critical thinking and the necessity for verification and corroboration of claims before accepting them. And he returns again and again to the role of the mass media in forming our characters and opinions. He is especially concerned with the fact that more and more mass media operations are coming into the possession of fewer and fewer individuals or groups. The potential for abuse of power is obvious but, as Orwell said, we have to keep pointing out the obvious. Sagan is hopeful that the internet will be an antidote for this concentration of control over information. So am I.

Another favorite theme of Sagan's is the need for scientists to be communicators, to use the media and the classroom to explain to the masses the truths and beauties of science, instilling in them the sense of wonder which drives people like himself. His criticisms of typical science instruction in America and the paucity of science writers for popular markets are right on target and worth studied perusal by science educators.

It is easy to recommend a book so reflective of one's own views, especially views which are skeptical of belief in God and an afterlife. It is even easier to recommend a book which, even though it covers topics and ideas the reader has gone over a thousand times, does so in a style which makes them seem fresh, is rarely dull, and quite frequently stimulates the reader to want to think about these issues more deeply and wonder if there isn't more he could be doing to make this world a better, saner, more rational place for our children and grandchildren.

Carl Sagan died on December 20, 1996, and it now seems apparent that A Candle in the Dark was meant to be his epitaph. Nothing could be more fitting, for if anyone has been light in these Dark Ages, it was Carl Sagan. But he was more like one of Velikovsky's comets, showering the earth with gifts as he passed through.