Because they are so bright, Cepheids can be clearly seen millions of light years away and can be easily distinguished from other bright stars in their vicinity, making them indispensable tools in any astronomers' kit.
The paper, published in Nature Astronomy on February 4, details work by Australian and Chinese astronomers to examine the classical "Cepheids" - a collection of huge, young stars in the Milky Way that can be up to 100,000 times brighter than the sun. They also pulsate radially for days to months at a time - and this period of pulsation can be combined with the Cepheid's brightness to reliably establish its distance from the sun.
Now, scientists came up with the most accurate 3D map of our galaxy, and it seems that Milky Way is "warped and twisted", and it's nothing like we've imagined until now.
Previously, astronomers saw evidence of hydrogen clouds becoming warped in the Milky Way.
It was only in recent centuries that it became an established scientific fact that Earth orbits the sun, and later that the solar system - along with hundreds of billions of other stars - orbits a common galactic center. According to Chao Liu, a study co-author and researcher at the National Astronomical Observatories, the warping seems to be caused by torque induced by the rotation of the inner disk of the galaxy.
"We used a new catalog of infrared observations obtained with the WISE space observatory to reduce the effects of dust and determine the distances to our Cepheids with uncertainties of less than 3 to 5 percent - that's an unprecedented accuracy to date", stated Richard de Grijs, an astrophysicist from Macquarie University and an author of the paper.
An artist's impression of the warped and twisted Milky Way disk.
"It is notoriously hard to determine distances from the Sun to parts of the Milky Way's outer gas disc without having a clear idea of what that disc actually looks like", says Xiaodian Chen, lead author, from the Chinese Academy of Sciences in Beijing.
"This offers new insights into the formation of our home Galaxy".
The new map, produced by astronomers from Macquarie University in Australia and the Chinese Academy of Sciences, shows that the warped Milky Way disk also contains young stars.
The study appearsin the journal Nature Astronomy. Instead of lying in a flat plane, the galaxy takes on a bit of a twisted "S" shape. But as you move toward the outermost reaches of the galaxy, the gravitational glue of the centre fades.
This finding allowed for an updated map of the galaxy's "stellar motions", says Dr. Deng Licai, senior researcher at NAOC.
"Perhaps more importantly, in the Milky Way's outer regions, we found that the S-like stellar disk is warped in a progressively twisted spiral pattern". So our Milky Way's twists are rare but not unique.
At 447.2 million barrels, US crude oil inventories were about 6 percent above the five-year average for this time of year. Also dampening market sentiment still were worries about weaker global economic growth and the US-China trade dispute.
This was also the last meeting of the MPC before the Election Commission announces the dates for the Lok Sabha elections. The rupee weakened to 71.69 to the dollar immediately after the decision, but it later strengthened to 71.42.
It's not too dissimilar to the All Blacks here a couple of years ago when we got beaten up and we got beaten up again", he said. Even for us, the last time we went to Murrayfield, we did not get off the bus and we were 21-5 down at half-time.
The US Africa Command Director Gregg Olson confirmed the development and clarified no civilian was killed during the attack. On Friday at least 13 Shabaab fighters were killed in a United States army airstrike outside Mogadishu .
He then proceeds to take the lid off and put the bottle on its side, allowing the liquid to pour out onto the floor. The new clip rolls and Jackman can be seen sitting in a library with a bottle of Aviation Gin on the table.
US West Texas Intermediate ( WTI ) crude futures were at $53.74 per barrel at 0153 GMT, up 8 cents from their last settlement. As per the American Petroleum Institute, the WTI stockpile stock increased by 2.5 million barrels last week.
In the video above, Reynolds keeps his side of the bargain with a heartfelt commercial for Jackman's Laughing Man coffee . With a concerned look on his face Jackman then says: "I'm not quite ready to show mine yet, let's just cut it there".
The playmaker has always been linked with a move to Spain, and told French radio station RMC he has made a decision on his future. Hazard has made 30 appearances in all competitions this season, scoring 15 goals .
The actor has since broken his silence on the snub , saying that he was " embarrassed " and felt like he "hadn't done" his job. He added, "And I went, 'Oh wow.' And the first thing I felt was embarrassment".
Roach was less patient, throwing the bat at Anderson and sending a high catch whizzing to Ben Stokes at second slip. Joined by last man Shannon Gabriel, Bravo hoisted Ali for six to close in on the half-century.
R Kelly announces Australian tour amid #MuteRKelly backlash
Kelly is a multi-platinum R & B star who has not only notched multiple hits for himself, but also many high-profile performers. Kelly announced an upcoming Australian tour yesterday on Twitter , much to the dismay of pretty much everyone.
Windies add Keemo Paul to squad for third Test
Congratulating the WINDIES Women on their 2-1 T20I series win over Pakistan Women in Karachi over the weekend, the President said the region is incredibly proud of its men's and women's teams.
Bud Light Super Bowl Ad Delivers Epic Surprise
Dating app Bumble's commercial featured American tennis star Serena Williams, and marketed directly to the female audience. Musical artist Rihanna declined to perform during the Super Bowl halftime show in support of Kaepernick.
Houston Rockets acquire Iman Shumpert in three-way trade
Jackson, 23, is in his second year and has been a regular contributor off the bench, averaging 6.7 points and 2.8 rebounds. Knight will be one of the many expiring contracts they're expected to have on the books next season.