new moon
'Luna nueva' in Spanish refers to the 'new moon' phase in English. It is the first phase of the moon, when it orbits as seen from the earth; the moment when the moon and the sun have the same ecliptical longitude. The moon is not visible at this time except when it is seen in silhouette during a solar eclipse when it is illuminated by earthshine. Used in a sentence, it could be: 'No podemos ver la luna nueva en el cielo nocturno.' which translates to 'We can't see the new moon in the night sky.'
Today, it's a new moon, you can barely see a thin line in the sky.
This sentence is often used to describe the sky and the visibility of the moon when it is a new moon. The sentence is indicating the reduced visibility of the moon that is typical during the new moon phase.
The new moon is when the moon is between the earth and the sun.
This sentence explains a scientific concept about the position of the moon, earth, and sun during a new moon phase. During this phase, the moon, which cannot be seen from the earth, is between earth and the sun.
During the new moon, the stars are more visible.
This sentence describes that during the phase of the new moon, when the moon is not visible in the night sky, the stars appear more luminous and evident due to the lack of moonlight.