‘Don’t Look Down’: Vietnam Glass-Bottomed Bridge Targets Thrill-Seekers

People walk on the Bach Long glass bridge during the opening ceremony at Moc Chau district in Son La province, Vietnam, May 28, 2022. Picture taken May 28, 2022. (Reuters)
People walk on the Bach Long glass bridge during the opening ceremony at Moc Chau district in Son La province, Vietnam, May 28, 2022. Picture taken May 28, 2022. (Reuters)
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‘Don’t Look Down’: Vietnam Glass-Bottomed Bridge Targets Thrill-Seekers

People walk on the Bach Long glass bridge during the opening ceremony at Moc Chau district in Son La province, Vietnam, May 28, 2022. Picture taken May 28, 2022. (Reuters)
People walk on the Bach Long glass bridge during the opening ceremony at Moc Chau district in Son La province, Vietnam, May 28, 2022. Picture taken May 28, 2022. (Reuters)

A mountain resort in Vietnam has opened a bridge with a bottom made of glass over a gorge 150 meters (492.13 ft) below to attract thrill-seeking tourists, the third such bridge in the Southeast Asian country.

The Bach Long suspension bridge, which translates as "White Dragon", is in Son La province, northwest of the capital, Hanoi, and bordering Laos.

"I dared not look down as I am afraid of heights," said one visitor, Vi Thi Thu, 22, who ventured onto the bridge after attending Saturday's opening ceremony, which included dragon dancing and ribbon cutting.

The reinforced glass used for the bridge has three layers, each 40mm thick, and can hold up to 450 people at a time, according to a statement from the facility's owner.

The bridge is 290 meters long between two peaks on either side of a gorge, plus a 342-meter pathway on the cliffside.

Guinness World Records lists a 562-meter glass-bottomed bridge in Qingyuan, in China's Guangdong province, as the world's longest.

"The engineering required to build that into the side of a cliff but maintain all the features of nature, the greenery, the rocks, it's been an amazing project," said Glen Pollard, a representative of Guinness World Record, who attended the opening ceremony.

The World Record Association, also a record-certifying body, has listed the two-part Vietnamese bridge as the world's longest at 632 meters.

Another visitor at the opening ceremony said he quickly overcame initial nerves when walking on the bridge.

"At first it makes you panic, but then if you walked over around 10 glass panels, that feeling is gone," said Tran Xuan Tinh, 72.



Alien Planet Lashed by Huge Flares from its 'Angry Beast' Star

File Photo: An imagined view of the three planets orbiting an ultracool dwarf star just 40 light-years from Earth discovered using a specialist telescope at ESO's La Silla Observatoryin Chile. ESO/M. Kornmesser/N. Risinger
File Photo: An imagined view of the three planets orbiting an ultracool dwarf star just 40 light-years from Earth discovered using a specialist telescope at ESO's La Silla Observatoryin Chile. ESO/M. Kornmesser/N. Risinger
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Alien Planet Lashed by Huge Flares from its 'Angry Beast' Star

File Photo: An imagined view of the three planets orbiting an ultracool dwarf star just 40 light-years from Earth discovered using a specialist telescope at ESO's La Silla Observatoryin Chile. ESO/M. Kornmesser/N. Risinger
File Photo: An imagined view of the three planets orbiting an ultracool dwarf star just 40 light-years from Earth discovered using a specialist telescope at ESO's La Silla Observatoryin Chile. ESO/M. Kornmesser/N. Risinger

Scientists are tracking a large gas planet experiencing quite a quandary as it orbits extremely close to a young star - a predicament never previously observed.

This exoplanet, as planets beyond our solar system are called, orbits its star so tightly that it appears to trigger flares from the stellar surface - larger than any observed from the sun - reaching several million miles (km) into space that over time may strip much of this unlucky world's atmosphere, Reuters reported.

The phenomenon appears to be caused by the planet's interaction with the star's magnetic field, according to the researchers. And this star is a kind known to flare, especially when young.

"A young star of this type is an angry beast, especially if you're sitting as close up as this planet does," said Netherlands Institute for Radio Astronomy astrophysicist Ekaterina Ilin, lead author of the study published in the journal Nature.

The star, called HIP 67522, is slightly more massive than the sun and is located about 407 light-years from Earth in the constellation Centaurus. A light-year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km).

This star and planet, as well as a second smaller gas planet also detected in this planetary system, are practically newborns. Whereas the sun and our solar system's planets are roughly 4.5 billion years old, this star is about 17 million years old, with its planets slightly younger.

The planet, named HIP 67522 b, has a diameter almost the size of Jupiter, our solar system's largest planet, but with only 5% of Jupiter's mass. That makes it one of the puffiest exoplanets known, with a consistency reminiscent of cotton candy (candy floss).

It orbits five times closer to its star than our solar system's innermost planet Mercury orbits the sun, needing only seven days to complete an orbit.

A flare is an intense eruption of electromagnetic radiation emanating from the outermost part of a star's atmosphere, called the corona. So how does HIP 67522 b elicit huge flares from the star? As it orbits, it apparently interacts with the star's magnetic field - either through its own magnetic field or perhaps through the presence of conducting material such as iron in the planet's composition.

"We don't know for sure what the mechanism is. We think it is plausible that the planet moves within the star's magnetic field and whips up a wave that travels along magnetic field lines to the star. When the wave reaches the stellar corona, it triggers flares in large magnetic field loops that store energy, which is released by the wave," Ilin said.

"As it moves through the field like a boat on a lake, it creates waves in its wake," Ilin added. "The flares these waves trigger when they crash into the star are a new phenomenon. This is important because it had never been observed before, especially at the intensity detected."

The researchers believe it is a specific type of wave called an Alfvén wave, named for 20th century Swedish physicist and Nobel Prize laureate Hannes Alfvén, that propagates due to the interaction of magnetic fields.

The flares may heat up and inflate the planet's atmosphere, which is dominated by hydrogen and helium. Being lashed by these flares could blast away lighter elements from the atmosphere and reduce the planet's mass over perhaps hundreds of millions of years.

"At that time, it will have lost most if not all the light elements, and become what's called a sub-Neptune - a gas planet smaller than Neptune," Ilin said, referring to the smallest of our solar system's gas planets.

The researchers used observations by two space telescopes: NASA's TESS, short for Transiting Exoplanet Survey Satellite, and the European Space Agency's CHEOPS, short for CHaracterising ExOPlanet Satellite.

The plight of HIP 67522 b illustrates the many circumstances under which exoplanets exist.

"It is certainly no sheltered youth for this planet. But I am not sad about it. I enjoy diversity in all things nature, and what this planet will eventually become - perhaps a sub-Neptune rich in heavy elements that did not evaporate - is no less fascinating than what we observe today."