Astronomers reveal first image of black hole at the heart of our Milky Way galaxy
Berlin, May 12: Astronomers on Thursday unveiled the first image of the supermassive black hole at the centre of our own Milky Way galaxy.
The finding, published in The Astrophysical Journal Letters, provides overwhelming evidence that the object is indeed a black hole and yields valuable clues about the workings of such giants, which are thought to reside at the centre of most galaxies.
The image was produced by a global research team called the Event Horizon Telescope (EHT) Collaboration, using observations from a worldwide network of radio telescopes.
The finding was unveiled during simultaneous press conferences around the world, including at the European Southern Observatory (ESO) headquarters in Germany.
The image is a long-anticipated look at the massive object that sits at the very centre of our galaxy. Scientists had previously seen stars orbiting around something invisible, compact, and very massive at the centre of the Milky Way.
This strongly suggested that this object known as Sagittarius A* (Sgr A* ) is a black hole, and the image provides the first direct visual evidence of it.
Although we cannot see the black hole itself, because it is completely dark, glowing gas around it reveals a tell-tale signature: a dark central region (called a shadow) surrounded by a bright ring-like structure, the researchers said.
The new view captures light bent by the powerful gravity of the black hole, which is four million times more massive than our Sun, they said.
We were stunned by how well the size of the ring agreed with predictions from Einstein's Theory of General Relativity," said EHT Project Scientist Geoffrey Bower from the Institute of Astronomy and Astrophysics, Academia Sinica, Taipei.
"These unprecedented observations have greatly improved our understanding of what happens at the very centre of our galaxy, and offer new insights on how these giant black holes interact with their surroundings," Bower said.
Because the black hole is about 27 000 light-years away from Earth, it appears to us to have about the same size in the sky as a doughnut on the Moon.
To image it, the team created the powerful EHT, which linked together eight existing radio observatories across the planet to form a single Earth-sized virtual telescope.
The EHT observed Sgr A* on multiple nights in 2017, collecting data for many hours in a row, similar to using a long exposure time on a camera.
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Delhi HC dismisses IPL team RCB's plea against Uber Moto's YouTube advertisement
New Delhi, May 5 (PTI): The Delhi High Court on Monday dismissed a plea by Indian Premier League cricket team Royal Challengers Bengaluru against a YouTube advertisement of Uber Moto featuring Sunrisers Hyderabad's cricketer Travis Head, saying no prima facie case of disparagement or infringement of trademark was made out.
The court opined that the general perception created by holistic viewing of the advertisement is one of healthy banter and good-natured lighthearted humour, as it refused to grant an interim injunction on the advertisement.
The high court said in the advertisement there was "no element of demeaning/ criticism/ condemning/ ridiculing/ defaming/ mocking or falsity" with a view to injure or harm the RCB trademark or RCB cricket team.
Justice Saurabh Banerjee dismissed the application by Royal Challengers Bengaluru, saying it does not call for any interference at this stage.
"All throughout the impugned advertisement, there is no (in)direct imputation/ insinuation/ comparison/ exaggeration/ sensationalism/ distortion of matters of fact of any kind by any of the defendants against the RCB trademark/ RCB cricket team," the court said in its 35-page order.
Royal Challengers Sports Private Limited filed a suit against Uber India Systems Pvt Ltd claiming that Uber Moto's YouTube advertisement titled "Baddies in Bengaluru ft. Travis Head" disparages its trademark.
The court, which passed the order on an interim application by RCB for relief, added the advertisement cannot be said to be false and misleading at this stage and there is no scope of any kind of irreparable harm, loss and injury likely to be caused to the plaintiff due to non-grant of temporary injunction.
The court said there is no prima facie case of disparagement or infringement of trademark made out by the plaintiff in its favour and against the defendants.
"The impugned advertisement is in the context of a game of cricket, a game of sportsmanship, which, in the opinion of this court, does not call for interference of any sort at this stage, especially while this court is considering the present application...
"More so, since in a case like the present one, interference by this court, at this stage, would tantamount to allowing the plaintiff to run on water with assurances of their not falling," Justice Banerjee said.
The court said there is nothing underlying in the advertisement which can trigger or motivate any members of the general public, much less any of the players/ viewers/ followers of any of the RCB or SRH cricket teams at this stage.
"There can be no one-sided impression or one-sided version of the impugned advertisement, particularly, since what according to the plaintiff is ‘right’ can according to the defendants be ‘wrong’, and vice versa.
"The act(s) of disparagement cannot be concluded on the basis of the reviews/ comments/ statements made by few viewers/ followers as there are always two sides of a coin. In any event, the same cannot form or be the benchmark for determining the act of disparagement and/ or infringement... This is not a telltale," the court said.
Earlier, describing the video advertisement, RCB's counsel said the cricketer could be seen running towards Bengaluru cricket stadium with an aim to vandalise the signage of "Bengaluru Vs Hyderabad", takes a spray paint and writes "Royally Challenged" before Bengaluru making it "Royally Challenged Bengaluru" which disparages RCB's mark.
The lawyer contended that when a negative comment is made, there is disparagement and added that Uber Moto, being the commercial sponsor of Sunrisers Hyderabad IPL team, while promoting its product of booking a ride, used RCB's trademark in the course of its trade, that too its "deceptive variant", which was impermissible under law.
The counsel representing Uber said RCB had "severely discounted" the sense of humour of the public at large.
Uber's counsel said good humour, sense of fun and banter are intrinsic to advertising messaging and these factors "will be killed" if such a standard, as mooted by RCB, is applied.
The advertisement, by then, had garnered 1.3 million views and a number of comments from users on the social media platform.
