时间:2025-05-01 13:49:35 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."
Plane makes emergency landing after engine rips apart during flight2025-05-01 13:40
尤文意甲81球 !迪巴拉追平C羅紀錄 囧叔:還要買人2025-05-01 13:20
巴黎收獲隊史法甲第十冠 波帥執教生涯首獲聯賽冠軍2025-05-01 13:15
官宣:河南隊舊將周定洋加盟中超升班馬成都蓉城隊2025-05-01 13:06
Watch MTV's Video Music Awards 2016 livestream2025-05-01 12:48
巴黎收獲隊史法甲第十冠 波帥執教生涯首獲聯賽冠軍2025-05-01 12:40
山東隊再戰獅城水手直麵兩大挑戰 輪換餘地不大體能成疑2025-05-01 12:18
德轉:重慶兩江競技隊球員阿德裏安加盟河南嵩山龍門2025-05-01 11:46
This coloring book is here for all your relationship goals2025-05-01 11:40
廣州城球員接到收假通知 本周三重啟集訓備戰聯賽2025-05-01 11:17
Give your kitchen sponge a rest on this adorable bed2025-05-01 13:45
南美足壇再爆發大規模球迷騷亂 一人被刺數刀身亡2025-05-01 13:34
C羅達成英超百球裏程碑 最喜歡的對手是維拉和熱刺2025-05-01 13:31
人民日報體育評本輪亞冠:打一場進一步 用努力回擊質疑2025-05-01 13:29
Two astronauts just installed a new parking spot on the International Space Station2025-05-01 13:14
媒體人:國腳海南集訓陪陳戌源踢球 多次喂餅沒少進球2025-05-01 12:56
曝艾克森恢複迅速已與全隊合練 俱樂部仍在等待證明文件2025-05-01 12:45
教育部:探索女子足球人才培養“一條龍”模式2025-05-01 11:55
Metallica to seek and destroy your eardrums with new album this fall2025-05-01 11:11
劍指皇馬 !曼城妖鋒單場4射1傳 上次雙殺就靠的他2025-05-01 11:03