时间:2025-09-16 18:12:55 来源:网络整理编辑:知識
Even to the naked eye, the Milky Way is a stunning thing. That makes a high-resolution look at the g
Even to the naked eye, the Milky Way is a stunning thing. That makes a high-resolution look at the galaxy's hydrogen clouds even more dramatic.
Scientists from Australia and Germany have produced a new, detailed survey of the Milky Way, dubbed HI4PI. It shows the presence of hydrogen gas in the galaxy, Naomi McClure-Griffiths, a professor at the Australian National University (ANU) told Mashable, as well as its neighbours, the Andromeda Galaxy and the Magellanic Clouds.
SEE ALSO:Bye, bye, Rosetta: The best moments from the spacecraft's historic missionThe map is a full sky survey of the Milky Way, in the same way the Earth is sometimes laid out as a 2D map.
"You can see the plane of the Milky Way, that's what we see as the band in the sky," McClure-Griffiths said. "What we're pulling out is all of the hydrogen gas associated with the Milky Way and the nearby galaxies."
The purple and orange colours in the map tell us how much gas is present.
"Each frame tells us how fast that gas is moving with respect to us [on Earth]," she added. "When the colours are brightest, that's where there's a lot of gas. When you can see the whole screen filled with bright colours, that's the [gas] that's closest to us."
According to McClure-Griffiths, the map took a "terrifyingly long time" to create. Researchers began collecting data in 2006. It then took five years to combine two data sets from Australia's CSIRO Parkes dish and the Max-Planck telescope in Germany.
Advances in camera technology also made such a detailed survey possible. Both telescopes used to have what she called "essentially a one-pixel camera," but new multi-pixel cameras made the process far speedier.
"That meant that instead of it taking 26 years to do the Australian survey, it took two years," she said.
HI4PI could be used as a starting point to map the Milky Way in ever new levels of detail. McClure-Griffiths compared it to a "finding chart" that early explorers used as they set out to carefully trace the coasts of countries like Australia for the first time.
Publishing their findings in the Astronomy and Astrophysicsjournal, the team hopes the map will also help us understand how the Milky Way's structures are formed.
That includes how galaxies such as the Milky Way get fresh gas to continue forming stars. "They're kind of like people -- they need to be fed all the time," she explained.
"By having this level of detail, we can look at where the gas may be coming into the Milky Way -- we're sort of searching out the food sources."
5 people Tim Cook calls for advice on running the biggest company in the world2025-09-16 17:57
藍軍下季正印中鋒猜想:阿圭羅PK吉魯 數據對比一覽2025-09-16 17:55
曼城足總杯首發 :斯特林熱蘇斯領鋒線 埃德森替補2025-09-16 17:13
歐聯8強抽簽:曼聯對陣西甲勁旅 阿森納遭遇黑馬2025-09-16 17:08
What brands need to know about virtual reality2025-09-16 17:01
陳戌源:我不讚成上港更名海港 國安可能會繼續使用2025-09-16 16:53
足協主席挨罵曾打退堂鼓 正視裁判問題魯能沉冤得雪?2025-09-16 16:45
英媒:切爾西拿到下季歐冠資格 就會1.3億簽哈蘭德2025-09-16 16:38
This app is giving streaming TV news a second try2025-09-16 16:18
英媒:切爾西拿到下季歐冠資格 就會1.3億簽哈蘭德2025-09-16 16:02
Tributes flow after death of former Singapore president S.R. Nathan2025-09-16 17:57
安帥:我們輸給了世界最佳球隊 曼城有最強替補席2025-09-16 17:39
拜仁前瞻 :南大王遇最愛對手 萊萬繼續衝穆勒紀錄2025-09-16 17:21
滄州雄獅老總:引援目標鎖定津蘇兩隊 球隊近幾年最強2025-09-16 17:05
Wikipedia co2025-09-16 16:56
海港董事長:中國足球麵臨新的重大挑戰 我們要努力攀登2025-09-16 16:41
比利時主帥 :相信阿紮爾 他將會是夏季歐洲杯最佳2025-09-16 16:33
連續兩年直麵央視專訪 陳戌源能讓中國足球更透明嗎 ?2025-09-16 16:31
This chart shows just how high Simone Biles can jump2025-09-16 16:02
國足一年多未踢正式比賽 同組對手早已確定熱身賽2025-09-16 15:37