Magnetic Field Current Affairs - 2020

NASA sends probes to map poles of the sun

NASA (National Aeronautics and Space Administration) of the United States and the ESA (European Space Agency) will send space probes to the sun to map its poles. The solar orbiter was launched on February 9, 2020.

Highlights

The probe will use gravitational influence of the Earth and Venus to position itself at 26 million miles from the sun. It is 95% of distance between the sun and the earth. The probe will map the poles for the first time. This will help scientists to observe the solar winds. The solar winds permeate the solar system.

Solar Winds

The solar winds are released from the upper atmosphere of the sun. These winds carry charged particles and magnetic clouds from the sun. These winds are capable of damaging life on the earth. Therefore, it is important to learn about these winds. They are now being filtered by the thick atmosphere around the earth.

The winds are a reason for the planets including the earth to revolve around the sun.

Get these updates on Current Affairs Today Android App

Molten Jet Stream discovered deep inside Earth’s core  

Scientists for the first time have discovered the so-called molten jet stream within the Earth’s molten iron core using latest data obtained from three European satellites called Swarm.

The three satellites were launched in 2013 with the goal of studying Earth’s magnetic field.  The latest satellite data that helps create an sharpest ‘x-ray’ view of the planet.

Key Facts 
  • The molten jet stream is an accelerating band of molten iron circling the North Pole. It just like the jet stream in the atmosphere
  • It moves about 40 km per year, currently in a westward direction. This speed is three times faster than normal outer-core speeds and hundreds of thousands of times faster than rate at which Earth’s tectonic plates move.
  • It is located along a boundary between two different regions in the core. This movement is caused when liquid in core flows toward the boundary from both sides and then is squeezed out sideways.
  • Significance: The satellite data has helped clarify Earth’s inner workings and magnetic field. It showed that changes in the magnetic field are actually being caused by the molten jet stream.
  • The discovery can also add light in changing magnetic field of earth and may relate it with switch in direction of the jet stream.

Get these updates on Current Affairs Today Android App