A signal received from the New Horizons spacecraft shows that it survived its historic encounter with Pluto.
Data in its first call home since Tuesday's flyby suggest the spacecraft experienced no upsets as it hurtled past the icy world at 14km/s,
The signal came through a giant dish in Madrid, Spain - part of a Nasa network of communications antennas.
Received at 01:53 BST, the message took four hours and 25 minutes to traverse 4.7 billion km of space.
There was joy and relief at mission headquarters in Laurel, Maryland as scientists and engineers cheered, hugged each other and waved American flags.