Which time (solar or sidereal) are astronomers more likely to use to plan their observations?

Nationalsim led to major conflicts following world war1 especially when

Which of the following is not true of television journalism? television is even more effective than the radio as an agency for influencing public opinion. you must pay millions of dollars to build up and project the proper television image for their candidates. television media performs a public service in the field of political education. we should form our opinions by listening to network commentators to get a well-rounded perspective, as you can assemble from different sources we should listen to more than one commentator and read background articles in boo and magazines

Why might the greeck city states have an advantage over the persians