Friday, May 22, 2020

A study published in journal Astronomy & Astrophysics last month reported astronomers from the European Southern Observatory (ESO) and elsewhere discovered a black hole in the Telescopium constellation. The study stated the black hole is about 1010 ± 195 light years (310 ± 60 parsec) away from the Solar System, meaning it is the nearest known black hole from the Earth. The nearest previously known black hole — V616 Mon — the study noted was usually estimated at more than 3000 light years away.

The black hole described in the study is located in the HR 6819 stellar system of Telescopium constellation, making it the first system visible to the naked eye to contain a black hole. HR 6819 contains two stars, and they are visible from the Southern Hemisphere. The astronomers started observing the system in 1999. Initially, they thought it was just a binary system, consisting of two stars. However, upon examination, the researchers concluded there was a third unseen object in the system. One of the two stars in the HR 6819 system is close to the black hole and orbits the black hole in just 40.333 ± 0.004 days.

This newly discovered black hole does not have an accretion disk. A black hole forms an accretion disk when a significant amount of matter orbits the black hole, as depicted in the image. Accretion disks often emit electromagnetic radiation. Since this black hole does not have an accretion disk, researchers had to rely on the gravitational effect of the black hole on the nearby star in order to discover it.

Researchers used the binary mass function to conclude the black hole had a mass of at least 4.2 M_? (Solar masses; 1 Solar mass = mass of the Sun). Its companion star, which orbits the black hole in about 40 days, is classified as a B3 III star. The outer star is classified as a Be star. Be stars rotate very quickly around their axes. Since the outer star rotates so rapidly, the star is not exactly spherical, but instead oblate, bulged at its equator, forming a gas disk around the equator.

The research suggested HR 6819 was very similar to another system LB-1. The HR 6819 system is estimated to be between 15–75 million years old (myr). The inner star has estimated mass of at least 6.3 ± 0.7 M_?. Using the mass and the speed at which the inner star rotates, the researchers concluded the black hole had an estimated mass of 5.0 ± 0.4 M_?. Researcher and co-author of the study Thomas Rivinius told Wikinews the inner star and the black hole are closer than the Sun and the Earth (1au; 150 million km; 93 million miles).

The researchers dedicated the paper to Stanislav Štefl, one of the fellow researchers who died in a car accident in 2014 in Santiago, Chile.

Wikinews caught up with Thomas Rivinius to discuss about this discovery.

Wednesday, December 5, 2007

The weather satellite GOES-12, which provides most of the weather pictures for the United States, became unusable on Tuesday, December 4. The satellite is positioned in geostationary orbit over the Amazon. A normal station-keeping maneuver to adjust its location was not completed as usual and services could not be continued.

The National Oceanic and Atmospheric Administration (NOAA) operates the satellites for its National Weather Service (NWS). NOAA’s satellite division intends to attempt Wednesday night to return GOES-12 to normal mode. The satellite is in its “safe” mode, which is used to protect it until problems can be identified and repaired. It is properly oriented toward the Sun so it will have full electrical power for further commands.

The GOES-10 satellite, located slightly further east, has been taken from South American coverage and is providing North American service. GOES-13 is in orbital storage in case it is needed for replacing a failed satellite.

Wednesday, May 11, 2016

Comply or Die, the racehorse who won the 2008 Grand National has died at the age of 17. His death was announced by his former trainer, David Pipe. He died over at the weekend in Gloucestershire, where he had been staying with jockey Timmy Murphy. He was cremated on Monday and his ashes will return to Murphy.

Murphy was the jockey in the saddle when Comply or Die won the 2008 Grand National. Speaking to the Press Association, he spoke about the horse’s death. He said, “He was part of the furniture at home so it’s very sad. He gave me the greatest day of my career, obviously that can never be taken away. He paraded at Cheltenham and Aintree and was getting ready to do some dressage in the summer. I’m not actually sure how he died, to be honest, but it wasn’t nice to come home to. He was cremated on Monday. He was a happy horse and he was also very clever.”

During his racing career he made £798,809 in prize-money after winning a total of eight races.

The 2008 Grand National victory was his greatest achievement and he almost matched it when he came second place in 2009. He retired in 2011 but remained active, often being paraded at race grounds such as Aintree and Cheltenham. He also participated in some hunting activities. Pipe said, “Since his retirement he had been a lead-horse at Timmy Murphy’s establishment before trying his hand at dressage, a discipline in which he had proven very successful”.

Tributes have been paid to Comply or Die on social media by horse racing fans with several tweeting their appreciation and memories.

Friday, May 28, 2010

File:Joe Sestak Congressional Photo.jpg

US Representative Joe Sestak, a Democrat from Pennsylvania, says that he was offered a job in the Obama administration if he would drop out of a Senate primary election. Obama told journalists in a news conference that an official report on the allegations will be released “shortly”. 

Sestak made the allegations first in February. Media attention grew, however, only when he defeated Arlen Specter, the incumbent senator and White House-preferred candidate, in the Senate primary last week. Since then, there has been more pressure on the Obama administration to reveal what they discussed with Sestak. 

Republican leaders have asked the Attorney General’s office to review the legal implications of this job offer, but the Justice Department has rejected other requests to investigate or appoint a special prosecutor. 

Wednesday, December 31, 2008

What would you tell your grandchildren about 2008 if they asked you about it in, let’s say, 20 years’ time? If the answer to a quiz question was 2008, what would the question be? The year that markets collapsed, or perhaps the year that Obama became US president? Or the year Heath Ledger died?

Let’s take a look at some of the important stories of 2008. Links to the original Wikinews articles are in all the titles.

Wednesday, December 31, 2008

What would you tell your grandchildren about 2008 if they asked you about it in, let’s say, 20 years’ time? If the answer to a quiz question was 2008, what would the question be? The year that markets collapsed, or perhaps the year that Obama became US president? Or the year Heath Ledger died?

Let’s take a look at some of the important stories of 2008. Links to the original Wikinews articles are in all the titles.

Saturday, March 17, 2018

In the United States, autopsy results were released on Thursday by the Napa County Sheriff’s Office, which show that Albert Wong killed himself after shooting his three hostages at The Pathway Home veterans’ psychiatric center in Yountville, California last Friday. The hostages died instantly from rifle shots to the head, and Wong shot himself in the head with a shotgun. Officials said there was no indication any of the four was killed by a sheriff’s deputy who exchanged shots with Wong.

The Sheriff of Napa County also acts as the county coroner. According to the official report, the three hostages “all suffered immediately fatal head wounds caused by a high velocity projectile consistent with the rifle that the shooter, Albert Wong, used in this incident”. Wong’s fatal head wound was self-inflicted. Sheriff’s Captain Steven Blower clarified that neither Wong nor the hostages was shot by the deputy.

According to authorities, Wong, a former Pathway resident, drove a rented car to the center Friday, March 9, and shortly after 10 AM local time (UTC-8), dressed in black and armed with a semi-automatic rifle, took five of the people at a leaving party hostage. The first call to the emergency 9-1-1 number was made at about 10:20. About ten minutes later, shots were heard, and a sheriff’s deputy and Wong exchanged fire. Wong then shut himself in a room with three of the hostages. The campus was evacuated, but there was no further contact with Wong. A little before 6 PM, a video feed from a remote-controlled robot showed the four people in the room were probably dead.

The three victims were all women. Christine Loeber, 48, was the executive director of the home. Jen Golick, 42, was its clinical director. Jennifer Gonzales Shushereba, 36, was a psychologist on the staff of the San Francisco Department of Veterans Affairs Healthcare System and also worked with PsychArmor, a nonprofit group, to create a toolkit for college campuses to assist students with post-traumatic stress disorder (PTSD). She was entering her last trimester of pregnancy.

Wong, 36, was a decorated veteran who served in the infantry in Afghanistan for a year in 2011–2012. He had been in treatment at the center for about a year but had been expelled two weeks before the hostage-taking because knives were found in his possession. His brother Tyrone Lampkin told The Press Democrat, Wong had been angry and said he “wanted to get back at them”, but what he had mentioned was to “talk to them, yell at them, not to kill them”.

The Board of Directors of The Pathway Home announced on Wednesday that it would suspend operations “indefinitely”. It is a ten-year-old non-profit in-patient center treating veterans with PTSD, brain injuries, depression and addictions on the campus of the Veterans Home of California Yountville. Yountville is a small town in the wine country a little more than 50 miles north of San Francisco. Founded as a last-resort center for intensive treatment of veterans who had not been helped by other approaches, it transitioned in 2015 to providing care to those not yet in crisis, including veterans studying at Napa Community College. The Veterans Home is the largest in the United States, with more than 900 residents.