Ongoing Mega-Surveys

Large number of new surveys

• Multi-terabyte in size, 100 million objects or larger
• Individual archives planned and under way

Multi-wavelength view of the sky

• More than 13 wavelength coverage within 5 years

Impressive early discoveries

• Finding exotic objects by unusual colors

  L,T dwarfs, high redshift quasars
  

• Finding objects by time variability

  gravitational micro-lensing
  

MACHO

2MASS

SDSS

DPOSS

GSC-II

COBE MAP

NVSS

FIRST

GALEX

ROSAT

OGLE, ...

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