Sentence examples for first observing from inspiring English sources

He recommended a weeklong program of repairs to address the issue, but the project's directors refused to delay the start of the first observing run any longer.

In 1859 Kirchhoff and the German chemist Robert Wilhelm Bunsen discovered two new elements cesium and rubidium by first observing their spectral lines.

We present results from the first observing epoch (December 1997) of 5 GHz VSOP monitoring program of the parsec-scale jet in 3C 273C

Since first observing a planet orbiting a star other than our sun in 1992, astronomers have made definitive sightings of about 1000 "exoplanets" and have identified a further 3000 to 4000 candidate exoplanets.

This is done by first observing that in this wider Mach number range the shock cell structure in the jet plume usually begins with a strong shock followed by a quasi-periodic shock cell structure.

First, observing that the gradient ∇ f α = ∇ f + α I is ( L + α ) -Lipschitzian and α-strongly monotone, the mapping Proj C ( I − γ ∇ f α ) is a contraction with coefficient 1 − γ ( 2 α − γ ( L + α ) 2 ) ≤ 1 − 1 2 α γ, where 0 < γ ≤ α ( L + α ) 2. So, the regularized problem (1.2) has a unique solution, which is denoted as x α ∈ C and which can be obtained via the Banach contraction principle.

Such behaviour was first observed in 2013.

(The holiday was first observed in 1986).

REM Sleep was first observed in Apr.

Voyager 2 first observed them in August 1981.

The holiday was first observed on Jan . 20 , 1986