![Answer the following questions:(a) The earth's magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably? (b) Answer the following questions:(a) The earth's magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably? (b)](https://d2rrqu68q7r435.cloudfront.net/images/9634427/2321d9e8-d98f-430f-8a8e-6f2ee84e36b4.jpg)
Answer the following questions:(a) The earth's magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably? (b)
![Astronomers discover a Sun-like star 350 light-years away that has consumed a rocky equivalent of 15 Earths- Technology News, Firstpost Astronomers discover a Sun-like star 350 light-years away that has consumed a rocky equivalent of 15 Earths- Technology News, Firstpost](https://images.firstpost.com/wp-content/uploads/2017/10/tabbys-star-380.jpg)
Astronomers discover a Sun-like star 350 light-years away that has consumed a rocky equivalent of 15 Earths- Technology News, Firstpost
![English: Astronomers using data from ESO's Very Large Telescope (VLT), at the Paranal Observatory in Chile, have made an impressive composite of the nebula Messier 17, also known as the Omega Nebula English: Astronomers using data from ESO's Very Large Telescope (VLT), at the Paranal Observatory in Chile, have made an impressive composite of the nebula Messier 17, also known as the Omega Nebula](https://c8.alamy.com/comp/2BAMAYN/english-astronomers-using-data-from-esos-very-large-telescope-vlt-at-the-paranal-observatory-in-chile-have-made-an-impressive-composite-of-the-nebula-messier-17-also-known-as-the-omega-nebula-or-the-swan-nebula-the-painting-like-image-shows-vast-clouds-of-gas-and-dust-illuminated-by-the-intense-radiation-from-young-stars-the-image-shows-a-central-region-about-15-light-years-across-although-the-entire-nebula-is-even-larger-about-40-light-years-in-total-messier-17-is-in-the-constellation-of-sagittarius-the-archer-about-6000-light-years-from-earth-it-is-a-popular-target-for-amate-2BAMAYN.jpg)