THE DISTANT UNIVERSE

1. Image thermal dust emission in evolving galaxies at epochs as early as z=10.

2. Yield kiloparsec-resolution images of dust emission in active galaxies and QSOs.

3. Detect CO, CI, CII emission lines from Galaxies and QSOs. A line luminosity of 10,000,000 solar luminosities at z=0.5 will be detectable in under 10 minutes.

4. Image the microwave decrement in galaxy clusters; together with AXAF observations, this will provide an accurate determination of the Hubble constant.

5. Resolve regions of particle acceleration in the jets and lobes of radio galaxies.

6. The MMA, with the world's largest aperture at wavelengths around 1 mm, will be crucial to millimeter-wave VLBI. Accretion disks in galaxies as distant as the Virgo Cluster will be seen at 20 microarcseconds resolution.