Did You Know?
What makes the Earth's inner core?
Earth cutaway from core to exosphere.
The inner core of the Earth, its in nnermost part as detected by seismological studies, is a primarily solid ball about 1,220 km (760 mi) in radius, or about 70% that of the Moon. It is believed to consist of an ironnickel alloy, and may have a temperature similar to the Sun's surface, approximately 5700 K (5430 °C). The existence of a solid inner core distinct from the liquid outer core was discovered in 1936 by seismologist Inge Lehmann using observations of earthquake-generated seismic waves that partly reflect from its boundary and can be detected by sensitive seismographs on the Earth's surface.
For all latest news, follow The Daily Star's Google News channel.
Comments