LOM v1.0atomicLOM v1.02URLhttp://portal.discoverthecosmos.eu/node/193328enLook at pictures of NGC 4636 and NGC 4697 in the "Galaxy Atlas" catalogue. These do not look like the beautiful spirals we have already seen. In fact, these galaxies are simply a lot of stars clumped into the same region of space with no measurable interstellar dust or gas. Since there is almost no gas and dust in these galaxies, new stars are not forming now. The galaxies look like ellipses, so astronomers call them "elliptical galaxies".Shapes of galaxies; galaxy nucleus; foreground stars and spiral arms.LOM v1.0final1.0LOM v1.0authorHANDS-ON UNIVERSE™LOM v1.0publisherHANDS-ON UNIVERSE™enLOM v1.0LOM v1.0creatorHANDS-ON UNIVERSE™LOM v1.0validatorHANDS-ON UNIVERSE™LOM v1.0LOM v1.0LOM v1.0LOM v1.0text/htmlhttp://portal.discoverthecosmos.eu/node/193328LOM v1.0noLOM v1.0noLOM v1.0activeLOM v1.0mediumLOM v1.0mediumLOM v1.0Inquiry-Based TeachingLOM v1.01 didactic hour12-1515-18LOM v1.0DisciplineScienceAstronomy: GalaxiesAstronomy: Galaxy clustersAstronomy: StarsScientific enquiry: Application of science - generallyScientific enquiry: Asking questionsScientific enquiry: Contexts for scienceScientific enquiry: Ideas and evidence in scienceScientific enquiry: Prediction compared to resultsScientific enquiry: Recording observations/measurementsScientific enquiry: Science: historical and contemporary examplesScientific enquiry: Scientific predictionScientific enquiry: SI unitsScientific enquiry: Using science to explain