Published on August 29, 2007
Images from the Hubble Space Telescope: Images from the Hubble Space Telescope www.ast.cam.ac.uk/~trentham/wednesday.ppt Neil Trentham Slide2: 5 light hours 5 light years 100,000 ly 1 million ly 10 billion light years As we move to the left, the Universe is getting younger Slide3: Hubble can resolve a few kilometers on the Moon. This is Crater Copernicus Slide4: We know a great deal about structures on nearby planets like Mars. Slide5: We know rather less, but still a fair amount, about the gas giants and their moons. This is Jupiter and Io. Slide6: Hubble has given us some good pictures of Saturn, and its rings, which are made of large snowballs. Slide7: Comets have a complex structure when they get in the inner solar system. Here, comet LINEAR breaks up. Slide8: Stars have a range of sizes and colours. Blue stars are big and hot. Red stars are smaller and cooler. Slide9: Some stars are made of condensed matter and are extremely dense and faint. Examples are white dwarfs, neutron stars, or, in the extreme form, black holes. Slide10: Clouds of gas that are about to become stars often show many interesting features. Slide11: Regions of space where there are a lot of stars forming, like the Eagle Nebula, are often spectacular. Slide12: Supernovae are explosions in galaxies that can outshine the rest of the galaxy for a few days. Slide13: Elliptical Spiral Most galaxies are either ellipticals or spirals. Slide14: M64 is a nearby spiral galaxy with a great deal of dust. Slide15: The Sombrero Galaxy is a very big galaxy with a bulge of stars surrounding a disk. Slide16: NGC 1300 is a barred galaxy. Slide17: Clusters of galaxies contain very many elliptical galaxies Slide18: Some galaxy clusters have some very big galaxies. Slide19: Occasionally galaxies have rings of stars around them. Slide20: NGC 4013 is seen right along its edge. Slide21: Galaxies like M100 extend quite far away from their centres. Slide22: The Cartwheel Galaxy has a ring of star-forming regions. Slide23: The SMC is a small galaxy next to the Milky Way. You can see it from the southern hemisphere. Slide24: Dwarf galaxies tend to be very diffuse. Slide25: The Tadpole Galaxy has a long plume of material. You can see many background galaxies in this picture Slide26: The Whirlpool Galaxy M51 is an interacting galaxy. Slide27: Here are two spiral galaxies beginning an interaction. Slide28: This is an interaction between three galaxies. Slide29: This is an unusual situation, where six galaxies collide with each other. Slide30: The galaxy has a substantial dark matter halo. Slide31: Galaxy cluster with each other to produce large scale structure. We see this in computer simulations. Slide32: Some galaxy have bright quasars at their centers. These are powered by material falling onto large black holes. Slide33: In the Hubble Deep Field, we see galaxies when they were very young.