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Strange flashes are coming from our nearest black hole, scientists say @ 2019-08-14T08: 返回 熱門新聞
關鍵詞:black hole Black Hole
概念:
IN AN INTERVIEW WITH SCIENCEALERT, DO SAID, 「THE BLACK HOLE WAS SO BRIGHT I AT FIRST MISTOOK IT FOR THE STAR S0-2, BECAUSE I HAD NEVER SEEN SGR A* THAT BRIGHT. OVER THE NEXT FEW FRAMES, THOUGH, IT WAS CLEAR THE SOURCE WAS VARIABLE AND HAD TO BE THE BLACK HOLE. I KNEW ALMOST RIGHT AWAY THERE WAS PROBABLY SOMETHING INTERESTING GOING ON WITH THE BLACK HOLE.」
HOW DID MASSIVE BLACK HOLES FORM IN THE EARLY UNIVERSE? THE ROTATING GASEOUS DISK OF THIS DARK MATTER HALO BREAKS APART INTO THREE CLUMPS THAT COLLAPSE UNDER THEIR OWN GRAVITY TO FORM SUPERMASSIVE STARS. THOSE STARS WILL QUICKLY COLLAPSE AND FORM MASSIVE BLACK HOLES.
BEFORE THEY TURN INTO SUPERMASSIVE BLACK HOLES, THESE MONSTROUS COSMIC BEINGS FEED OFF MATERIAL FROM A DISK OF SURROUNDING MATTER, THE PROCESS OF WHICH CREATES AN EXTREMELY BRIGHT, COMPACT SOURCE OF LIGHT KNOWN AS A QUASAR. DURING A BLACK HOLE"S EARLY GROWTH PERIOD, A DENSE CLOUD OF GAS BLOCKS THE QUASAR"S LIGHT UNTIL THE BLACK HOLE FINISHES CONSUMING THE GAS.
ASTRONOMERS AREN"T DONE WITH MAJOR BLACK HOLE DISCOVERIES THIS YEAR. THE MAX PLANCK INSTITUTE"S KIANUSCH MEHRGAN AND COLLEAGUES HAVE FOUND THE LARGEST BLACK HOLE EVER OBSERVED AT THE CENTER OF HOLM 15A, A GALAXY ABOUT 700 MILLION LIGHT-YEARS AWAY. IT"S MORE THAN TWICE AS LARGE AS THE PREVIOUS OBSERVED RECORD-SETTER AT 40 BILLION TIMES THE MASS OF THE SUN, AND 10,000 TIMES THE MASS OF THE BLACK HOLE AT THE CORE OF THE MILKY WAY.
AN ULTRA-DISTANT QUASAR SHOWING PLENTY OF EVIDENCE FOR A SUPERMASSIVE BLACK HOLE AT ITS CENTER. HOW THAT BLACK HOLE GOT SO MASSIVE SO QUICKLY IS A TOPIC OF CONTENTIOUS SCIENTIFIC DEBATE, BUT MERGERS OF SMALLER BLACK HOLES FORMED IN EARLY GENERATIONS OF STARS MIGHT CREATE THE NECESSARY SEEDS. MANY QUASARS EVEN OUTSHINE THE MOST LUMINOUS GALAXIES OF ALL.
IT』S POSSIBLE THAT WE』LL KEEP FINDING LARGER AND LARGER BLACK HOLES, AND THAT WE』LL NEED TO KEEP INVENTING NEW NAMES FOR THE SIZE CATEGORIES. WE』VE HAD BLACK HOLES, THEN SUPER MASSIVE BLACK HOLES, AND NOW ULTRA MASSIVE BLACK HOLES.
這次他們推出的「BLACK HOLE」包款系列便是將環境保育發揮得淋漓盡致的系列。所有商品皆為 PATAGONIA 回收超過 1 千萬個塑料寶特瓶後重制而成,100% 環保材質打造的系列包含托特包、後背包和含有滑輪的旅行包款等等。
WHY IS THAT? AS BLACK HOLES SUCK THE MATTER FROM SPACE, THAT MATTER AT ITS FRINGES ACCELERATES AND FORMS WHAT’S KNOWN AS AN ACCRETION DISK. THE MATTER IN THAT DISK RUBS AGAINST ITSELF AS IT SPINS TOWARD THE EVENT HORIZON— A BLACK HOLE"S POINT OF NO RETURN — SPITTING OUT X-RAYS IN THE PROCESS. BUT ISOLATED BLACK HOLES, WHICH ARE SMALL COMPARED TO SUPERMASSIVE BLACK HOLES, DON"T EMIT A GREAT DEAL OF X-RAYS THIS WAY. THERE SIMPLY ISN"T ENOUGH MATTER OR ENERGY IN THEIR ACCRETION DISKS TO CREATE LARGE X-RAY SIGNATURES. AND PAST SEARCHES FOR IBHS USING X-RAYS HAVE FAILED TO PRODUCE CONCLUSIVE RESULTS.
IT』S SO BIG, IT COULD FIT OUR ENTIRE SOLAR SYSTEM INSIDE IT MANY TIMES OVER. IT』S EVEN LARGER THAN YOUR AVERAGE SUPERMASSIVE BLACK HOLE — MAKING IT, IN THE TERMINOLOGY OF THE RESEARCHERS, AN 「ULTRAMASSIVE」 BLACK HOLE.
AS YOU KNOW, BLACK HOLES ARE CALLED THAT BECAUSE THE GRAVITY IN THEIR CENTRE IS SO STRONG, IT SUCKS ALL NEARBY LIGHT IN. NONE CAN ESCAPE. THAT』S HOW STRONG A BLACK』S HOLE』S GRAVITATIONAL PULL IS.
THESE OBJECTS ARE THOUGHT TO BE FORMED FROM BINARY BLACK HOLES WHICH HAVE THEN GONE ON TO MERGE WITH OTHER BLACK HOLES. SCIENTISTS BELIEVE THAT THESE "NEXT GENERATION" BLACK HOLES -- MADE UP OF THE MERGER OF THEIR "PARENTS" -- MIGHT BE THE HEAVIER BLACK HOLES OBSERVABLE BY LIGO AND VIRGO.
WITH THAT IN MIND, YOU MIGHT UNDERSTAND JUST WHY THE 『CLOAKED』 SUPERMASSIVE BLACK HOLE NASA HAS JUST DISCOVERED SOUNDS SO OMINOUS.

 

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