List of All Articles with Tag 'h'

New findings have revealed that time ran five times slower in the early universe, after scientists published new research into quasars. A quasar is a luminous active galactic nucleus and studying them has allowed scientists to measure time. The variation in brightness of quasars from the early universe has been measured to determine time dilation back to a billion years after the Big Bang. Experts have found that there was an era in which clocks moved five times slower than they do in the present day. The findings come as a relief to many cosmologists who have been perplexed by previous results that have come from studying quasars. The discovery that the universe is expanding led to the theorisation of “time dilation” – the idea that time moved slower the smaller the universe was. Sign up to our free Indy100 weekly newsletter Professor Geraint Lewis of the University of Sydney, the lead author of a new study, said in a statement: “Looking back to a time when the universe was just over a billion years old, we see time appearing to flow five times slower.” He continued, explaining: “If you were there, in this infant universe, one second would seem like one second – but from our position, more than 12 billion years into the future, that early time appears to drag.” To measure the extent of time dilation, scientists turned to quasars, as they are able to measure their change in brightness over a period they can estimate. The most distant quasar that is visible is 13 billion back in time and can still be seen despite its far distance. Their brightness varies due to turbulence and lumpiness in their accretion disks. Lewis explained the phenomenon as being “a bit like the stock market”. He said: “Over the last couple of decades, we’ve seen there is a statistical pattern to the variation, with timescales related to how bright a quasar is and the wavelength of its light.” Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Usually, my best MLB prop bets are all about pitchers, but today we’re taking a different approach in one game, looking at a team total in the Houston Astros-Colorado Rockies matchup.For those looking for pitcher props, don’t worry, I have a plus-money prop from DraftKings Sportsbook...

An overview of the media in Canada, including links to broadcasters and newspapers.

Chelsea winger Hakim Ziyech has taken to social media to make fun of his failed move to Al Nassr, dismissing concerns of a knee problem in his medical.

Inflation, higher interest rates and declining real estate values are worsening wealth inequality in Canada, with younger households

The Los Angeles Angels and San Diego Padres have a great pitching matchup on tap on Tuesday, July 4 – but how should we bet it?Shohei Ohtani (7-3, 3.02 ERA) gets the ball for the Angles on Tuesday, and Padres outfielder Juan Soto seems confident in his team’s chances against the AL M...

Asia’s oil refiners, responsible for meeting about a third of the world’s fuel consumption, are getting ready to

There are eight planets in our solar system – plus poor old Pluto, which was demoted in 2006 – but what if there were more? Turns out that might be the case. Astronomers have calculated there is a 7 per cent chance that Earth has another neighbour hiding in the Oort cloud, a spherical region of ice chunks and rocks that is tens of thousands of times farther from the sun than we are. “It’s completely plausible for our solar system to have captured such an Oort cloud planet,” said Nathan Kaib, a co-author on the work and an astronomer at the Planetary Science Institute. Sign up to our free Indy100 weekly newsletter Hidden worlds like this are “a class of planets that should definitely exist but have received relatively little attention” until now, he said.. If a planet is hiding in the Oort cloud, it’s almost certainly an ice giant. Large planets like Jupiter and Saturn are generally born as twins. They have huge gravitational pulls of their own, however, and sometimes destabilise one another. That could have led to a planet to be nudged out of the solar system entirely – or exiled to its outer reaches, where the Oort cloud resides. “The survivor planets have eccentric orbits, which are like the scars from their violent pasts,” said lead author Sean Raymond, researcher at the University of Bordeaux’s Astrophysics Laboratory. That means that the Oort cloud planet could have a significantly elongated orbit, unlike the near-perfect circle Earth tracks around the sun. Trouble is, when things are that far away, they’re pretty difficult to spot. “It would be extremely hard to detect,” added Raymond. “If a Neptune-sized planet existed in our own Oort cloud, there’s a good chance that we wouldn’t have found it yet,” said Malena Rice, an astronomer at MIT not involved in this work. “Amazingly, it can sometimes be easier to spot planets hundreds of light-years away than those right in our own backyard.” Time to crack out the telescope. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

By Kanishka Singh Mass shootings in Philadelphia, Baltimore and Fort Worth claimed the lives of 10 people ahead

Liverpool midfielder Thiago Alcantara decides against taking up a lucrative offer from Saudi Arabia. The 32-year-old will stay at Anfield to fight for his place under Jurgen Klopp.

By Elizabeth Pineau PARIS (Reuters) -A crowdfunding campaign to raise money for the family of the policeman who shot dead

Twitter has been plunged into chaos in recent days, amid new “rate limits” and rules that actually stop people from using the site. The changes have been dramatic enough that they have led to speculation that they could be the thing to finally doom Elon Musk’s takeover of the social network. What are the ‘rate limits’? It is a somewhat technical term for a complex process that has a simple effect: users are rationed on how many tweets they can see. If people and the apps they use make too many requests too often – in this case for tweets – then the service will stop providing them. On Twitter, the new rate limits are different depending on what kind of user is on: someone who pays for the premium “Twitter Blue” service will get more than a normal user, for instance. They are also changing all the time, with the limit being increased recently. Twitter has long had rate limits, which ensure that malicious actors cannot send huge number of requests to the site and bring it down, for instance. But they would previously only have been hit by people using specific tools, since they were much higher. What happens when you hit the limit? Users will see a warning telling them they have received the rate limit. The site will then stop working properly, because it will refuse to load any more tweets. Why has it happened? The official explanation is that Elon Musk is concerned about how many artificial intelligence companies are scraping posts from Twitter in order to feed to their systems and teach them more about how to use language. In an attempt to stop that, Mr Musk placed the limits to make it harder for that scraping to happen. But there is no proof that is actually the case. The problems at Twitter may well be infrastructural issues caused by the site’s engineering, and its lack of staff, that have made it incapable of serving normal requests. Or it might be a mix of the two. There is no doubt that the site is being scraped, but rate limits of this kind are an unusual way of responding to it, and other sites that are being scraped have not needed to do the same thing. Are there other changes? The other major change instituted recently by Elon Musk is to ban people who are not signed into the site from seeing posts. This is ostensibly for the same reason, since it means that scrapers cannot just gather up posts from the site from the outside. It already means that some things about Twitter are not working as they used to. If someone sends a tweet within a messaging app, for instance, then the posts’ preview won’t show, since the app cannot access the tweet. Will this change how people use Twitter? Almost certainly. Much of Twitter’s value lies in its high-profile and high-commitment users: the celebrities, organisations and big brands who use it to post, and the engaged users who follow them. That is much of what sustains its place in culture, even as it gets fewer users than much bigger social networks such as Facebook. The recent changes have directly antagonised those users. Big organisations cannot rely on tweets as a way for anyone to see what they’re posting, since users have to be logged in; engaged users cannot rely on being able to use the platform, since they are set to be rate limited. What’s more, the recent changes could cause problems for advertisers, given how important it is for users to stay engaged and see their posts. Companies are already using Twitter less for advertising, as a result of other controversies, and that may just continue. Is this the end? Some people have been predicting an end to Twitter since long before Elon Musk took it over; when he did, those predictions got louder and more regular, but they have still been largely wrong. It appears that no matter what Mr Musk does, people keep logging on and using the site. That might well be largely due to network effects: the idea that the value really comes from the number of people using the platform, which also makes it very difficult to create a new one. People might be unhappy on Twitter, but the network effect means they might feel lonely or that they are missing out if they move elsewhere. But all of that doesn’t mean that this time around won’t be the end. Certainly the latest problems have the most obviously problematic effect, of forcing Twitter’s most engaged users to not use the app, which might finally encourage them to go elsewhere. In the end, the discussion is often based on the idea that there will be some big moment that causes everyone to leave Twitter, or for the app to die. In fact, social networks have tended to decline slowly before they are finally shut down; something that might already be happening on Twitter. What are the alternatives to Twitter? Again, people have been trying to replace Twitter for years, for reasons including everything from protests against its content management rules to opposition to its centralised nature. Attempts to create a new Twitter have only increased since Elon Musk took over the original one. But they have almost always failed to take off. Network effects and the relative maturity of Twitter as a platform mean that they have always faced a challenge, and never really met it. As such there are a number of alternatives to Twitter. Notable among them are Mastodon, which is decentralised and has become perhaps the most discussed new alternative, and Bluesky, an effort to build a new kind of Twitter that originally began with the company. But the most promising alternative might be about to launch. Meta is launching Threads this week, an app linked to Instagram that aims to allow people to post text updates that might have the might to actually take over from Twitter. What is happening to TweetDeck? TweetDeck also went down along with Twitter over the weekend. It’s unclear how the two are connected, though they happened at the same time. Now Twitter has announced that TweetDeck is coming back. But it comes with some changes, and the most notable of them is that people will have to pay for Twitter Blue to get access to it. Read More Twitter to stop TweetDeck access for unverified users Meta’s Twitter alternative Threads to be launched this week How Elon Musk finally broke Twitter – and why it might just be the start Twitter rival Bluesky halts sign-ups after huge surge in demand Twitter is breaking more and more Twitter rival sees huge increase in users as Elon Musk ‘destroys his site’