A galaxy is a large system of stars, interstellar gas, dust, dark matter and possibly dark energy, bound by the forces of gravitational interaction. The number of stars and sizes of galaxies can be different. As a rule, galaxies contain from several million to several trillions (1,000,000,000,000) stars. In addition to ordinary stars and the interstellar medium, galaxies also contain various nebulae. Dimensions of galaxies from several thousand to several hundred thousand light years. And the distance between galaxies reaches millions of light years.
спец387
15.10.2020
George has basketball lessons every week. Tina goes jogging twice a week. He is not working at the moment. At the moment he is surfing the net. Are the children sleeping? Yes, they are. Does your father work hard? Yes, he does. Do you have a lot of free time? No, I don't. Are you doing your homework? Yes, I am. Is your mother cooking? No, she isn't. Do your friends like sport? Yes, they do. Does your best friend live far from you? No, she doesn't. Are your parents watching TV? No, they aren't. Do you travel often? Yes, I do. Does your sister help around the house? No, she doesn't.
mgrunova
15.10.2020
George has basketball lessons every week. Tina goes jogging twice a week. He is not working at the moment. At the moment he is surfing the net.
Are the children sleeping? Yes,they are. Does your father work hard? Yes, he does. Do you have a lot of free time? No,I don`t. Are you doing your homework? Yes,I am. Is your mother cooking? No,she isn`t. Do your friends like sport? Yes,they do. Does your best friend live far from you? No,he doesn`t. Are your parents watching TV? No,they aren`t. Do you travel often? Yes,I do. Does your sister help around the house? No,she doesn`t.