Plasma-wave processes in the Earth's and planetary magnetospheres, ionospheres, and atmospheres
Trains are probably the best and the most convenient way to get to Nizhny Novgorod.
Note: In train timetables the old name of the city, "Gorky (Горький)", is still used as the destination name instead of Nizhny Novgorod.
The full train schedule can be found at http://www.rzd.ru. You can even book and pay for your ticket online from this site if you can read and understand Russian.
By train from Moscow:
There are several direct trains Moscow – Nizhny Novgorod as well as several trains departing from various Moscow's stations and going eastward via Nizhny Novgorod.
The fastest option is to take Burevestnik express which commutes between Moscow and Nizhny Novgorod twice per day (departure from Moscow's Kursky station at 1400 and at 1655). It will take around 4 and a half hours to get Moskovsky station in Nizhny. There are also comfortable overnight trains departing from Moscow's Kazansky station at about 2225 and from Kursky station at about 2355.
By train from Saint Petersburg
The night train "Volga" departs everyday at 1732 and arrives to Nizhny Novgorod at 0850 next morning.
There are also direct train connections with Kazan, Samara, Kirov, Yaroslavl and other cities of the region (there are mainly night trains). As well as with Vladivostok, Beijing, Ulaanbaatar, Irkutsk, Astrakhan, Simferopol, Novorossiysk and many others.
The international airport of Nizhny Novgorod (GOJ) is situated in Strigino district what is about 30-40 minutes by taxi from city centre (if there are no traffic jams).
to Kaliningrad (with connections to many European cities):
to Frankfurt (Germany):
You can get to the airport by buses number 11, 20, T-29 or by taxi (normal price from city centre will be around 700 roubles - appr. 30 USD).