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.
Beneath the clouds is a mantle of ices and gases and a small rocky core. Neptune's core contains more rock and metal than the cores of other gas giant planets. The planet has a magnetic field, which is tilted more than 50Â° to the rotation axis.