Inovke Internet Explorer

$IE = New-Object -ComObject InternetExplorer.Application
$IE.navigate2("www.bing.com")
#$IE.visible=$true

Controlling Internet Explorer object from PowerShell

How to open URL through powershell

Using Powershell to open internet explorer and login into sharepoint

How to open Internet Explorer for the desktop from command line in Windows 8?

USING IE AUTOMATION IN POWERSHELL TO SIMPLIFY BROWSER BASED TASKS

many ways to do that

Start-Process -Path "url"

[System.Diagnostics.Process]::Start("url")

(New-Object -Com Shell.Application).Open("url")