Messenger Issue 178

Highlights include:

• E. Vernet et al.: ELT M4 — The Largest Adaptive Mirror Ever Built
• GRAVITY Collaboration et al.: Spatially Resolving the Quasar Broad Emission Line Region
• GRAVITY Collaboration: GRAVITY and the Galactic Centre
• M. Wittkowski et al.: Precision Monitoring of Cool Evolved Stars: Constraining Effects of Convection and Pulsation
• GRAVITY Collaboration: Multiple Star Systems in the Orion Nebula
• C.L. Davies et al.: Spatially Resolving the Innermost Regions of the Accretion Discs of Young, Low-Mass Stars with GRAVITY
• S. Dong et al.: When the Stars Align — the First Resolved Microlensed Images
• GRAVITY Collaboration: Hunting Exoplanets with Single-Mode Optical Interferometry
• C.F. Manara et al.: The ESO Summer Research Programme 2019

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