The trial will begin at 1 p.m. Eastern Time each day. After the opening statements have finished, the Senate will ask questions for a total of 16 hours. Senators will not ask the question directly; rather, the presiding officer, Chief Justice John Roberts, will officially present the questions to whomever they are directed.
At that point, the Senate will vote on whether to have witnesses testify during the trial. If the Senate does decide to call witnesses, then they will depose each witness before that witness will be allowed to testify.
The trial ends with a vote involving every member of the Senate. If a two-thirds majority of the Senate votes to convict the individual facing impeachment, then the individual is convicted and removed from office. The Senate can further, by a simple majority, declare that the convicted individual can never again be eligible to hold public office.