Pairs of “HH knots” in PV Ceph. Pairs at similar distances=“jets”, and connectors should pass through source Warning: Hypothetical!

Pairs of “HH knots” in PV Ceph

But… Jets from PV Ceph “Miss” the Source

Can’t be (just) precession.

Where are the midway points?

What if PV Ceph was moving, fast?

PV Ceph: The MoviePV Ceph: The Movie

A “plasmon” deceleration model (Goodman & Arce 2003)

10,000 years agoJets from PV Ceph

9,500 years agoJets from PV Ceph

9,000 years agoJets from PV Ceph

8,500 years agoJets from PV Ceph

8,000 years agoJets from PV Ceph

7,500 years agoJets from PV Ceph

7,000 years agoJets from PV Ceph

6,500 years agoJets from PV Ceph

6,000 years agoJets from PV Ceph

5,500 years agoJets from PV Ceph

5,000 years agoJets from PV Ceph

4,500 years agoJets from PV Ceph

4,000 years agoJets from PV Ceph

3,500 years agoJets from PV Ceph

3,000 years agoJets from PV Ceph

2,500 years agoJets from PV Ceph

2,000 years agoJets from PV Ceph

1,500 years agoJets from PV Ceph

1,000 years agoJets from PV Ceph

Jets from PV Ceph 500 years ago

NOWJets from PV Ceph

Full HistoryPV Ceph

Stone Age

HieroglyphicsStandardized

Now

Caesar Born

““Bipolar” Bipolar” Outflow Outflow seen in seen in

Molecular Molecular GasGas

PV Ceph Corroborating Evidence

?

PV Ceph How did it do this?

Must be “gravity”!

Close encounter with another star

How did it do this?