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Article Contents

ABSTRACT

1.INTRODUCTION

2.WHAT MAKES A GOOD DISTANCE INDICATOR?

3.SOME NEW INSIGHTS

4.SUMMARY OF PNLF DISTANCES

5.SPIRALS

6.THE SPIRAL-ELLIPTICAL CONNECTION

7.DETAILS OF NEW M87 PNLF STUDIES

7.1.A deep PNLF distance contradicts the challenges

7.2.Sample size effects are small

7.3.Bright PN in M87's halo

8.CAN M87 REALLY BE AT 22 MPC?

9.SOME IMPORTANT DISTANCES

10.CONCLUSIONS

REFERENCES