Zaartan

A dark matter related question: We have strong evidence of gravitational effects on galaxies and galaxies clusters that must be caused by amounts of masses we can't detect in the EM spectre. We can actually detect the space-time curvature, thus implying "dark matter".

But could this space-time curvature be caused by something else entirely, so that no real mass is there? Maybe the curvature is just the lowest energy state possible in those regions of space?

Thanks

What brands of machines for tube filling do you use?

If you have multiples, what's you favourite and why?

Sponsorships aside (if any), what cameras would you recommend for an amateur looking to pick up photography?

How important is the hardware/software, compared to the actual skill of the photographer?