Excel 4.0 Workbook. .xlw. An Excel 4.0 file format that saves only worksheets, chart sheets, and macro sheets. You can open a workbook in this file format in Office Excel 2007, but you cannot save an Excel file to this file format.
According to scientists, the surface of Neptune is one of the coldest places in the Solar System. At its surface, where the clouds of the planet touch space, the temperature of Neptune can dip down to 55 Kelvin. Thatâs -218 degrees Celsius. Neptune and its Great Dark Spot.
The atmosphere of Neptune is 74 percent hydrogen, 25 percent helium and one percent methane. Its atmosphere is full of fearsome storms. Other than the Great Dark Spot, Neptune has other named areas of storms like the Scooter and the Small Dark Spot.