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Article Contents

ABSTRACT

1.INTRODUCTION: THE CONTENTS OF THE UNIVERSE

2.OBSERVIONS AND COSMOLOGICAL PARAMETERS
2.1.What the CMB does actually tell us?
2.2.Is the Universe accelerating ?
2.3.Some reasons for caution

3.THE MEAN DENSITY OF THE UNIVERSE FROM CLUSTERS

4.GLOBAL TESTS
4.1.The evolution of the abundance of clusters
4.2.The local temperature distribution function
4.3.The local temperature distribution function Omegam
4.4.Systematic uncertainties in the determination of Omegam
4.5.An other global test : the baryon fraction in local clusters
4.6.The baryon fraction in high redshift clusters

5.CONCLUSION

REFERENCES

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