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目前顯示的是 1月 4, 2019的文章

Remove Pdfbox logs

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0 How to turn off PDFBox warning logs ? OR how to solve this issue ? 2018-11-12 17:21:59,665 INFO [org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB] To get higher rendering speed on JDK8 or later, 2018-11-12 17:21:59,665 INFO [org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB] use the option -Dsun.java2d.cmm=sun.java2d.cmm.kcms.KcmsServiceProvider 2018-11-12 17:21:59,665 INFO [org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB] or call System.setProperty("sun.java2d.cmm", "sun.java2d.cmm.kcms.KcmsServiceProvider") 2018-11-12 17:22:00,095 INFO Pages : 6 2018-11-12 17:22:01,267 WARN [org.apache.pdfbox.pdmodel.font.PDTrueTypeFont] Using fallback font 'LiberationSans' for 'TrebuchetMS' 2018-11-12 17:22:01,792 WARN [org.apache.pdfbox.pdmodel.font.PDTrueTypeFont]

Milky Way

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This article is about the galaxy. For other uses, see Milky Way (disambiguation). spiral galaxy containing our Solar System Milky Way Galaxy The Milky Way's Galactic Center in the night sky above the Paranal Observatory (the laser creates a guide-star for the telescope). Observation data Type Sb, Sbc, or SB(rs)bc [1] [2] (barred spiral galaxy) Diameter 150–200 kly (46–61 kpc) Thickness of thin stellar disk ≈2 kly (0.6 kpc) [3] [4] Number of stars 100–400 billion [(1–4)×10 11 ] [5] Mass 0.8–1.5 × 10 12   M ☉ [6] [7] [8] [9] Angular momentum ≈ 7067100000000000000♠ 1 × 10 67  J s [10] Sun's distance to Galactic Center 26.4 ± 1.0 kly (8.09 ± 0.31 kpc) [11] [12] [13] Sun's Galactic rotation period 240 Myr [14] Spiral pattern rotation period 220–360 Myr [15] Bar pattern rotation period 100–120 Myr [15] Speed relative to CMB rest frame 631 ± 20 km/s [16] Escape velocity at Sun's position 550 km/s [