A reader in a bright city asks if there is any point

A letter came this week from a reader who lives, by their own description, in the middle of a city that never fully turns off. They had bought one of my books about the night sky, taken it out onto a balcony full of hope, looked up, and seen almost nothing. A washed out orange dome and maybe, if they squinted, three stars. Was there any point, they wanted to know, in someone like them bothering at all. I have been turning the answer over for three days, so here it is.

The short version is yes, and I want to be honest about why, because the dishonest version of this answer annoys me when other people give it. I am not going to tell you that the city sky is secretly wonderful if you only believe. It is not. Light thrown up from below washes out all but the brightest objects, and there is no trick that fixes that from a balcony. If someone promises you a river of stars from a car park, they are selling something.

But here is what the orange dome cannot take from you. The brightest things are still there, and the brightest things happen to be some of the most worth knowing. The Moon does not care how bright your street is. Give it a cheap pair of binoculars, brace your elbows against a wall to hold them steady, and you will see the edge where light meets shadow, and along that edge the craters stand up in relief as if someone has switched them on. People gasp the first time. Grown adults. It is one of my favourite sounds.

The bright planets punch through as well. That very steady, slightly golden thing low in the early evening that does not twinkle is not a star, and once someone shows you the difference you will never lose it. A planet holds its light steady because it is near enough to be a small disc rather than a point, and a point is what shivers when our air moves in front of it. Learn that one fact and half the sky reorganises itself for you.

A city cannot switch off the Moon, and the Moon is where almost everyone falls in love with looking up.

And then there is the thing I most wanted to write back to this reader, which is that a small sky learned well is worth more than a huge sky glanced at. If all you can reliably see is the Moon, a couple of planets and a handful of the loudest stars, then learn those completely. Watch the Moon change shape across a month. Notice one bright point return to the same corner a little earlier each week and understand that you are watching the planet you stand on lean into its year. Wonder is not a quantity of stars. It is the moment a light stops being scenery and becomes a place, a thing with a size and a distance and a name, and that moment is available to you from the least promising balcony in the brightest city on earth.

So do not wait for the perfect dark. It may be years before you get out to it, and the sky above your head is on tonight. Go back out. Start with the Moon. Everything else follows the Moon.

For anyone under a bright sky, Backyard Astronomy Without a Telescope is built around short, repeatable observations that need no telescope, only a backyard, a balcony or a doorstep.