Scientists have discovered that the Milky Way once had a sibling that was consumed by our neighboring galaxy.
In a new study, scientists reconstructed events that occurred two billion years ago by conducting a detailed survey of the stars found in the faint halo which surrounds the nearby Andromeda galaxy.
Originally thought to have been built up from multiple smaller galaxies over a long period of time, this mysterious halo is now believed to have formed primarily from the remnants of M32 – a satellite galaxy that was once a similar size to our own before its outer layers were consumed.
“It’s kind of like a child eating dinner, and then looking on the floor afterwards and finding breadcrumbs all around,” said postdoctoral researcher Richard D’Souza from the University of Michigan.
“You know what’s been eaten.”
After it was cannibalized, M32 was reduced to little more than a small, dense core.
“It was shocking to realise that the Milky Way had a large sibling and we never knew about it,” said study co-author Eric Bell. “Astronomers have been studying the Local Group – the Milky Way, Andromeda and their companions – for so long.”
Source: The Guardian
Milky Way galaxy is warped and twisted, not flat
Our galaxy, the Milky Way, is “warped and twisted” and not flat as previously thought, new research shows.
Analysis of the brightest stars in the galaxy shows that they do not lie on a flat plane as shown in academic texts and popular science books.
Astronomers from Warsaw University speculate that it might have been bent out of shape by past interactions with nearby galaxies.
The new three dimensional map has been published in the journal Science.
The popular picture of the Milky Way as a flat disc is based on the observation of 2.5 million stars out of a possible 2.5 billion. The artists’ impressions are therefore rough approximations of the truer shape of our galaxy, according to Dr Dorota Skowron of Warsaw University.
“The internal structure and history of the Milky Way is still far from being understood, in part because it is extremely difficult to measure distances to stars at the outer regions of our galaxy,” she said.
To gain a more accurate picture, Dr Skowron and her colleagues measured the distances of some of the brightest stars in the Milky Way, called Cepheid variable stars. These are massive young stars that burn hundreds, if not thousands, of times brighter than our own Sun. They can be so bright that they can be observed at the very edge of the galaxy.
Not only that, they also pulsate at regular intervals at a rate that is directly related to their brightness.
This enables astronomers to calculate their distance with great precision.
Most of the stars were identified by the Optical Gravitational Lensing Experiment (OGLE) at Las Campanas Observatory (LCO) in Chile’s southern Atacama Desert. Przemek Mroz, a member of the OGLE team, said that the results were surprising.
“Our results show that the Milky Way Galaxy is not flat. It is warped and twisted far away from the galactic centre. Warping may have happened through past interactions with satellite galaxies, intergalactic gas or dark matter (invisible material present in galaxies about which little in known).”
The Polish results support an analysis of Cepheid variable stars published in February in Nature Astronomy journal by astronomers from Macquarie University in Australia and the Chinese Academy of Sciences.
SpaceX Starship update coming later this month
Image Credit: SpaceX / Elon Musk
Starship could carry the first astronauts back to the Moon.
Elon Musk’s private space firm has been developing a spacecraft capable of landing humans on other worlds.
Designed to serve as the reusable second stage of the Big Falcon Rocket (BFR), Starship will also be able to carry astronauts and cargo all the way to the surface of Mars.
The spacecraft has undergone several name changes since it was first announced, having previously transitioned from Mars Colonial Transporter (MCT) to Interplanetary Transport System (ITS).
Now Elon Musk has revealed that a full update on the project will be coming on August 24th at either Cape Canaveral in Florida or Boca Chica in Texas, which is where a prototype was recently tested.
Writing on Twitter, he stated that the update would include a “detailed review of the first orbital Starship, explaining the pros and cons of each design decision.”
“We should have Starship Mk1 with 3 Raptors almost ready to fly by then,” he said.
It will certainly be interesting to see how things are progressing.
Source: Ars Technica
Exoplanet With 3 Suns a Great Site to Search for Alien Life
A newly discovered planet with three suns is exciting scientists for its close proximity to Earth and its potential for future observation, including possible signs of extraterrestrial life.
LTT 1445Ab is just 22.5 light-years away and was found using data gathered by NASA’s Transiting Exoplanet Survey Satellite (TESS), which searches for exoplanets.
The planet orbits just one of its three red dwarf stars, circling it every five days. It’s thought to be a third bigger than Earth, but has about eight times the mass of our planet and a temperature of about 320 degrees Fahrenheit.
“If you’re standing on the surface of that planet, there are three suns in the sky, but two of them are pretty far away and small-looking,” research co-author Jennifer Winters told New Scientist. “They’re like two red, ominous eyes in the sky.”
Because of its relative proximity to Earth, LTT 1445Ab could be used to look for potential signs of alien life.
Scientists think the planet could potentially have an atmosphere, and that they can examine the area for gases like carbon dioxide using new detection tools ready in the near future. LTT 1445AB will present plenty of opportunities for observations because of its speedy orbits around its sun.
IMAGE © NASA/JPL-Caltech
Too much karaoke gives man a collapsed lung
Wolves Exhibit Psychic Abilities which Have Saved People’s Lives
UFO Lands On A Mountain In Trinidad And Filmed By Witnesses
Creepy Dolls Mysteriously Appearing in Missouri are Unexplained and Spreading
Missing European Teenager Found Dead in Malaysian Jungle Under Mysterious Circumstances – Another Missing 411 Case?
Moon Landing Conspiracy Theory Persists
Area 51 Raid Will Be ‘Live Streamed’. Nearly 2,000,000 Are Going
Prehistoric aliens in Malta? Elongated skulls found in an underground temple will be analyzed
Mystery Boom Heard, Felt Across Four Western Illinois Counties Remains Unsolved
Everyone is Broke But YOU Don’t Have to Be a Debt Slave Any Longer
Ex Youtube Staff Exposes Corporate And Star Favoritism For Rule Breaking
Fox News: What Does the US Military Actually Know About UFOs?
Plasma Cosmology [Full Infomentary]
Signs of Change | Something Big is Happening
Deep State Takedown News: Declas WITHIN DAYS, Poulson Clown Agent, Lords Prayer Q Proof
- Aliens & UFO's3 months ago
Native Elder Shows a Petrified Alien Heart, Which He Claimed Belonged To The “Star People”
- Conspiracy Theories3 months ago
Terra-forming Is Happening To Planet Earth For Extraterrestrial Beings
- Conspiracy Theories3 months ago
20 Historical Paintings That Conspiracy Lovers Can’t Get Enough Of
- Ancient3 months ago
Camazotz: the “Batman” of Mayan mythology
- Fact or fiction3 months ago
Independent Scientists Claim That We Are Living In 1722, Not In 2019
- Aliens & UFO's3 months ago
Famed UFO researcher, Stanton Friedman, dead at 84
- Cryptozoology3 months ago
Pale Humanoid Creature Recorded In The Australian Outback
- Ghosts & Hauntings3 months ago
New Book Reveals London’s Oddest Hauntings