from center of the galaxy it came out of. yeah. it s 20 billion 20 million times mass of our sun and it is wild. we re trying to study that now with the james webb space telescope and as well as other observations with other observatories, but, yeah. that s another thing. how do these black holes form in the centers of galliaxies and evolve over time. a lot we don t know. and how they go traveling through space? it s frightening as well gts it s not heading towards us. so don t worry. that s a good, a good note to end on. really appreciate it. so many mysteries in the universe we re just uncovering. thanks so much for your expertise, appreciate it. yes. pleasure, thank you. russia has sent a spacecraft to retrieve three stranded astronauts on the international
this latest wave of protests hit really triggered by a deadly fire in rushing how 30s their handle the aftermath. on one hand, the authorities, they are insistent that the cover measures put in place have nothing to do with firefighters delay reaching the fire on the other hand, after insisting four weeks that lawyers must be maintained because of the outbreak they all of a sudden announced a phase reopening after the fire. all of that really serving at the latest and loudest of the way up calls to the people here in terms of how increasingly unscientific and ineffective, as well as potentially dangerous, this policy has become. not to mention, all of the observatories surrounding its enforcement. that s why, across the country, we are seeing people try to take matters into their own hands. taking to the streets, demanding their freedoms, also tearing down metal fences or barrier set up by local officials to steal them inside their residential compounds. also, of course, multiple
towards earth. let s make that clear. very clear. so why this asteroid in particular? well, this asteroid is pretty good for a few reasons. number one, it s and that allows us to do a test that is somewhat unambiguous and what i mean by that is how do you measure what impact you had on the object? right? what you can do in this case is look at how the period of the orbit changes, how long it takes to go around the other object so you know how far you moved it and gave it energy. but the other thing is that the impact is designed for when the asteroid is at the closest approach to earth. that means we have ground based observatories and aircraft to observe it. it is timing and configuration
By 2025, China plans to build eight more national atmosphere baseline observatories that will cover the country's major climatic zones to measure greenhouse gases, ozone and other factors that affect air quality.