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NASA is trying one last time to contact its record-setting Mars rover Opportunity, before calling it quits.
The rover has been silent for eight months, victim of one of the most intense dust storms in decades. Thick dust darkened the sky last summer and, for months, blocked sunlight from the spacecraft’s solar panels.
NASA said Tuesday it will issue a final series of recovery commands, on top of more than 1,000 already sent. If there’s no response by Wednesday — which NASA suspects will be the case — Opportunity will be declared dead, 15 years after arriving at the red planet.
Team members are already looking back at Opportunity’s achievements, including confirmation water once flowed on Mars. Opportunity was, by far, the longest-lasting lander on Mars. Besides endurance, the six-wheeled rover set a roaming record of 28 miles (45 kilometers.)
Its identical twin, Spirit, was pronounced dead in 2011, a year after it got stuck in sand and communication ceased.
Both outlived and outperformed expectations, on opposite sides of Mars. The golf cart-size rovers were designed to operate as geologists for just three months, after bouncing onto our planetary neighbor inside cushioning air bags in January 2004. They rocketed from Cape Canaveral a month apart in 2003.
It’s no easier saying goodbye now to Opportunity, than it was to Spirit, project manager John Callas told The Associated Press.
“It’s just like a loved one who’s gone missing, and you keep holding out hope that they will show up and that they’re healthy,” he said. “But each passing day that diminishes, and at some point you have to say ‘enough’ and move on with your life.”
Deputy project scientist Abigail Fraeman was a 16-year-old high school student when Opportunity landed on Mars; she was inside the control center as part of an outreach program. Inspired, Fraeman went on to become a planetary scientist, joined NASA’s Jet Propulsion Laboratory in Pasadena, California, and ended up deputy project scientist for Opportunity.
“It gives you an idea just how long this mission has lasted,” she said. “Opportunity’s just been a workhorse … it’s really a testament, I think, to how well the mission was designed and how careful the team was in operating the vehicle.”
Rather than viewing the dust storm as bad luck, Callas considers it good luck that we skirted so many possible storms over the years. Global dust storms typically kick up every few years, and “we had gone a long time without one.”
Unlike NASA’s nuclear-powered Curiosity rover still chugging along on Mars, Opportunity and Spirit were never designed to endure such severe weather.
Cornell University’s Steve Squyres, lead scientist for both Opportunity and Spirit, considers succumbing to a ferocious storm an “honorable way” for the mission to end.
“You could have lost a lot of money over the years betting against Opportunity,” Squyres told the AP Tuesday.
The rovers’ greatest gift, according to Squyres, was providing a geologic record at two distinct places where water once flowed on Mars, and describing the conditions there that may have supported possible ancient life.
NASA last heard from Opportunity on June 10. Flight controllers tried to awaken the rover, devising and sending command after command, month after month. The Martian skies eventually cleared enough for sunlight to reach the rover’s solar panels, but there was still no response. Now it’s getting colder and darker at Mars, further dimming prospects.
Engineers speculate the rover’s internal clock may have become scrambled during the prolonged outage, disrupting the rover’s sleep cycle and draining on-board batteries. It’s especially frustrating, according to Callas, not knowing precisely why Opportunity — or Spirit — failed.
Now it’s up to Curiosity and the newly arrived InSight lander to carry on the legacy, he noted, along with spacecraft in orbit around Mars.
As for Opportunity, “It has given us a larger world,” Callas said. “Mars is now part of our neighborhood.”(VOA)
The city of Delhi has seen it all; from sultanate rule, to dynasties, and to colonial rule. From monarchy to democracy, Delhi has gone through its phases. But, in order to know and explore the nuances of Delhi, you must read these beautiful books.
1. City of Djinns: A Year in Delhi by William Dalrymple
This book was written while Dalrymple was still flirting with his love for the Medieval India. The author writes, "Moreover the city- so I soon discovered- possessed a bottomless seam of stories: tales receding far beyond history, deep into the cavernous chambers of myth and legend," and just like this, Dalrymple takes you in a tour to discover Discover Delhi.
2. Delhi by Heart: Impressions of a Pakistani Traveller by Raza Rumi
This book explores how the author explores his identity as a South Asian Muslim and how his city of Lahore is a mirror image of Delhi. Rumi, in this book, tries to co-relate the past with the present by comparing its festivals, streets, and markets.
3. Delirious Delhi: Inside India's Incredible Capital by DavePrager
This book is quite interesting. The story of this book revolves around the lives of Dave and Jenny who have recently moved to Delhi when their firm began to go down. The city of Delhi in this book is shown through their eyes as they try to make their way in the city that holds together a very large population.
4. The Heart has its Reasons by Krishna Sobti, Translated by Reema Anand, Meenakshi Swami
The original title of this book is "Dil - o - Danish". This book tells the reader about the streets of Old Delhi and almost transport the reader back in the past. This book is basically set in the 1920's, and tells the tale of a man's extramarital affair, his children out of wedlock, black magic, and Chandni Chowk's rich culture of sweets and the perils of being a widow. Interestingly, many have compared the author of this book to Jane Austen.
5. Delhi: A Novel by Khushwant Singh
Who would talk about Delhi and not remember Khushwant Singh? This amazing book is just like a narrative of the author's fulfilled love affair with the city and with a eunuch. The narrator in this book is an aging man who is trying to discover the city. This book is truly a masterpiece, where it takes the readers on the history of Delhi glimpsing at what makes the city what it is– simply beautiful.
There are some of the Indian cities which are older than time. Therefore, we must know which cities are they, and what has been their history!
1. Varanasi (1200 BC–)
Varanasi is one of the oldest cities of India, and has been a center of religious and cultural activity since the Bronze Age. In fact, this city might have been in existence from a very long time, since it finds mention in the Rig Veda. It is believed that the city of Varanasi was thriving for more than 1600 years before the fall of the Roman Empire in Europe. This city is one of the holiest places for Hindus and Jains, and even Lord Buddha gave his very first sermon here in 528 BC. In Hinduism, it is believed that dying in Varanasi brings salvation, which is the reason why the city is always brimming with pilgrims.
2. Ujjain (700/600 BC–)
Ujjain was once considered as one of the most prominent cities in the Middle India. In fact, the name of this city is repeatedly mentioned in the literature of that period, i.e. in the works of stalwarts like Kālidāsa. This city has seen the rise and fall of numerous empires, from the Mauryas to the Avantis, Nandas, and even the Guptas. This city, just like Varanasi, is also considered as one of the holiest cities in India, and hosts one of the officially recognized Kumbh melas, the Ujjain Simhastha Kumbh, in which people across the world take place.
3. Madurai (500 BC–)
Madurai been a major center of culture and trade for more than 2500 years. In fact, the name of this city has been mentioned in the writings of the great traveler, Megasthenes, and has been ruled by several empires from the Pandyas and the Cholas to the Karnata, and finally the British. Interestingly, ‘'Koodal,' was one of its ancient name which means 'a congregation of learned men'. There is no doubt that Madurai was an epicenter of scholars and religious teachers in the southern part of India.
4. Thanjavur (300 BC–)
Thanjavur was formerly known as Tanjore. This city is pretty famous for its Tanjore style of painting, which is a traditional style that is characterised by the use of gold foil, religious imagery, and simple compositions. This city is best known for being the home of the Great Living Chola Temples, which is now a UNESCO World Heritage site. Till date, people across the world visit this place in order to experience its rich history and heritage.
By- Digital Hub
I prefer synthetic wigs as it isn't something that I would wear all the time - just when I look different. Additionally, their ease of use is an essential factor for me. However, suppose you're looking to wear a wig for a fashionable accessory or as a way for you to show your personality. In that case, I'd recommend buying multiple synthetic wigs of various styles and colors instead of only the one human hair wig at the same amount. However, be cautious - only purchase top-quality synthetic braids that are more expensive as you might be disappointed by the new style you've chosen.
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A decent human hair wig will cost more than one made of synthetic. This is due to the supply of hair. While synthetic fibers are produced as needed, but long hair of women of good quality is in scarce supply. Human hair of the highest quality comes that comes from Eastern Europe, which is very low. The highest synthetic wigs are afro short wigs If you are looking for a human hair wig, the cost is more expensive and usually exceeds five hundred dollars, contingent upon the size. But you can find both kinds of wigs at a discount price from online stores that specialize in discount hair wigs. Cheap wigs aren't at any time inferior in quality; they're just not the latest models. If price is a concern, you should always purchase a high-quality synthetic wig instead of a low-quality human hair wig.
Require a Wig
If you're not sure of which wig you should pick, However, our suggestion is to choose the highest-quality human hair wig, especially if you plan to make it your style of the moment and wear it all day. Human hair wigs are the best choice for those who require a wig due to loss of hair. However, go for an artificial wig if you want to enjoy the way you look and change your appearance now and then.
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In today's society, the wearing of a hair wig has become more common. A hair wig is an easy method to alter your appearance at any time you wish quickly. Women are more drawn to these wigs since they can change their hairstyle with ease. Wigs are usually worn by those who have shed their hair or those who wish to alter their hairstyle to be fashionable.
Human hair wigs on display at a store Image source: Photo by Markus Spiske on Unsplash
There is a variety of hair accessories in the market. They range from inexpensive to costly depending on their materials, style, and quality. If you're in search of a wig, then be sure to keep several factors in mind. First, the wig should be able to fit comfortably on your hair without making you appear odd. Additionally, the color of hair that is a part of the wig must match your physical appearance. Below are various hair accessories utilized by the majority of people.
If you are purchasing a human hair wig, make sure you know the origin of the hair. If you're looking to invest a few hundreds of dollars on a wig, it's recommended to purchase one of European hair. However, if the wig's label reads "human hair wig" without stating the origin for the hair, it's most likely made of Asian hair.
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Human hair wigs have many advantages:
Human hair wigs last longer than synthetic ones
Human hair is soft and natural to the touch.
Human hair wigs can be dyed and styled as your hair
Human hair wigs "breathes" and your scalp won't sweat more than it does under one
Human hair wigs need to be styled at least once per wash
Human hair wigs are costly
While you can find numerous styles of synthetic wigs, but there aren't all fibers produced in the same way; for example, wigs that are costume-related for Halloween are typically made of lower quality fibers, which are expensive and appear to be the hair wig. For Halloween parties, this is okay, but for everyday use, you'll need a wig that looks like it's been growing around your head. On the other hand, contemporary synthetic materials utilized in top-quality designer wigs look highly practical for those who want to look realistic.
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